Soil Acidification Risk Mapping for Crop Productivity and Land Management
Summary
By using key soil acidity indicators like topsoil pH, % exchangeable acid cations (Al, Mn, Fe), and base saturation, acidification hotspots that threaten crop yields and soil resilience can be identified. This use case supports sustainable land use planning, optimized liming strategies, and policy design for soil conservation in both high-input and climate-vulnerable regions.
Steps
Step 1: Build WKT payload for area of interest
For this use case the area of interest will be the entire Kenya country. The boundary can be retrieved and processed in the following way:
- Download GeoJSON
- Open downloaded file and save first
FeaturefromFeatureCollectioncontainer into a new file calledfeature.geojson - Open GeoJSON to WKT converter
- Drop
feature.geojsoninto the page - Click to convert to WKT
- Copy result to clipboard
Result:
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Step 2: Get a token
All API requests must be made over HTTPS and must include an authentication token.
A SoilHive client application is required to generate a token.
curl --request POST \
--url https://auth.soilhive.ag/oauth/token \
--header 'accept: application/json' \
--header 'content-type: application/x-www-form-urlencoded' \
--data grant_type=client_credentials \
--data audience=https://api.soilhive.ag/ \
--data client_id={client_id} \
--data client_secret={client_secret}
{
"access_token": "{token}",
"scope": "soilhive-api-services",
"expires_in": 86400,
"token_type": "Bearer"
}
Step 3: Get list of properties available for those area of interest and identify the relevant ones
Payload contains only geometry key. The value is a string set to the WKT obtained in Step 1.
curl --request POST \
--url https://api.soilhive.ag/v1/soil-properties/queries \
--header 'accept: application/ld+json' \
--header 'authorization: Bearer {token}' \
--header 'content-type: application/json' \
--data '
{
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}
'
{
"@id": "https://api.soilhive.ag/v1/soil-properties/queries",
"type": "ItemList",
"description": "List of soil properties",
"items": [
{
"type": "ChemicalProperty",
"identifier": 6,
"name": "Aluminium",
"unitText": "mg/kg, ppm",
"unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM, https://qudt.org/vocab/unit/PPM"
},
{
"type": "PhysicalProperty",
"identifier": 71,
"name": "Available Moisture",
"unitText": "cm3/cm3, %",
"unitCode": "cm3/cm3, https://qudt.org/vocab/unit/PERCENT"
},
{
"type": "ChemicalProperty",
"identifier": 42,
"name": "Base Saturation",
"description": "The base saturation measures the sum of exchangeable cations (nutrients) Na+, Ca++, Mg++ and K+ as a percentage of the overall exchange capacity of the soil (including the same cations plus H+ and Al+++). The value often shows a near linear correlation with pH. Data are derived directly from the WISE30sec database. ( % of CECsoil)",
"unitText": "mmolc/dm3",
"unitCode": "mmolc/dm3"
},
{
"type": "ChemicalProperty",
"identifier": 19,
"name": "Boron",
"unitText": "mg/kg, ppm, 100ppm",
"unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM, https://qudt.org/vocab/unit/PPM, 100ppm"
},
{
"type": "PhysicalProperty",
"identifier": 13,
"name": "Bulk Density",
"unitText": "10xkg/m3, cg/cm3, kg/dm3, kg/m3, g/cm3",
"unitCode": "10xkg/m3, cg/cm3, https://qudt.org/vocab/unit/KiloGM-PER-DeciM3, kg/m3, https://qudt.org/vocab/unit/GM-PER-CentiM3"
},
{
"type": "BiologicalProperty",
"identifier": 43,
"name": "C:N Ratio",
"description": "A carbon-to-nitrogen ratio is a ratio of the mass of carbon to the mass of nitrogen in soil material. The C:N ratio is a key indicator as it describes a balance between energetic foods (represented by carbon) and material to build protein with (represented by nitrogen). An optimal C:N ratio of around 24:1 provides for higher microbial activity (USDA, 2011). Data are directly derived from WISE30sec. Note that C/N ratios have been calculated as is from the measured data (CNrt), not as the ratio of the derived values for C and N, ditto for CECclay, as this would introduce additional errors."
},
{
"type": "ChemicalProperty",
"identifier": 55,
"name": "Ca/Mg ratio"
},
{
"type": "ChemicalProperty",
"identifier": 30,
"name": "Calcium",
"unitText": "mg/kg, ppm",
"unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM, https://qudt.org/vocab/unit/PPM"
},
{
"type": "ChemicalProperty",
"identifier": 8,
"name": "Calcium Carbonate"
},
{
"type": "ChemicalProperty",
"identifier": 50,
"name": "Calcium Saturation"
},
{
"type": "ChemicalProperty",
"identifier": 18,
"name": "Carbon Total",
"unitText": "g/kg, %, %w",
"unitCode": "https://qudt.org/vocab/unit/GM-PER-KiloGM, https://qudt.org/vocab/unit/PERCENT, https://qudt.org/vocab/unit/PERCENT"
},
{
"type": "ChemicalProperty",
"identifier": 9,
"name": "Cation Exchange Capacity",
"unitText": "mmolc/kg, cmolc/kg, cmol(+)/kg, meq/100g, cmol/kg, mmolc/100g",
"unitCode": "mmolc/kg, cmolc/kg, cmol(+)/kg, meq/100g, https://qudt.org/vocab/unit/CentiMOL-PER-KiloGM, mmolc/100g"
},
{
"type": "PhysicalProperty",
"identifier": 10,
"name": "Clay",
"unitText": "g/kg, g/100g, %",
"unitCode": "https://qudt.org/vocab/unit/GM-PER-KiloGM, g/100g, https://qudt.org/vocab/unit/PERCENT"
},
{
"type": "PhysicalProperty",
"identifier": 14,
"name": "Coarse Fragments",
"unitText": "g/100g, %, %v",
"unitCode": "g/100g, https://qudt.org/vocab/unit/PERCENT, %v"
},
{
"type": "ChemicalProperty",
"identifier": 20,
"name": "Copper",
"unitText": "mg/kg, ppm, 100ppm",
"unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM, https://qudt.org/vocab/unit/PPM, 100ppm"
},
{
"type": "ChemicalProperty",
"identifier": 2,
"name": "Electrical Conductivity",
"unitText": "dS/m, mS/m, mS/cm",
"unitCode": "https://qudt.org/vocab/unit/DeciS-PER-M, https://qudt.org/vocab/unit/MilliS-PER-M, mS/cm"
},
{
"type": "ChemicalProperty",
"identifier": 29,
"name": "Exchangeable acidity",
"unitText": "cmol/kg, cmolc/kg",
"unitCode": "https://qudt.org/vocab/unit/CentiMOL-PER-KiloGM, cmolc/kg"
},
{
"type": "ChemicalProperty",
"identifier": 24,
"name": "Extractable Bases"
},
{
"type": "ChemicalProperty",
"identifier": 44,
"name": "Gypsum",
"description": "Gypsum is a chemical compound (a salt) which occurs occasionally in soils particularly in the driest areas of the globe where it can occur in a flower-like form typically opaque with embedded sand grains called desert rose. In soils it may occur in fibers, crystals or soft. Data are derived directly from the WISE30sec database."
},
{
"type": "ChemicalProperty",
"identifier": 52,
"name": "Hydrogen Saturation"
},
{
"type": "ChemicalProperty",
"identifier": 7,
"name": "Iron",
"unitText": "mg/kg, ppm, 100ppm",
"unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM, https://qudt.org/vocab/unit/PPM, 100ppm"
},
{
"type": "ChemicalProperty",
"identifier": 31,
"name": "Magnesium",
"unitText": "mg/kg, ppm",
"unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM, https://qudt.org/vocab/unit/PPM"
},
{
"type": "ChemicalProperty",
"identifier": 51,
"name": "Magnesium Saturation"
},
{
"type": "ChemicalProperty",
"identifier": 21,
"name": "Manganese",
"unitText": "mg/kg, ppm, 100ppm",
"unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM, https://qudt.org/vocab/unit/PPM, 100ppm"
},
{
"type": "BiologicalProperty",
"identifier": 47,
"name": "Nematode Abundance"
},
{
"type": "ChemicalProperty",
"identifier": 3,
"name": "Nitrogen",
"unitText": "cg/kg, g/kg, %, %w, ppm, mg/Kg",
"unitCode": "cg/kg, https://qudt.org/vocab/unit/GM-PER-KiloGM, https://qudt.org/vocab/unit/PERCENT, https://qudt.org/vocab/unit/PERCENT, https://qudt.org/vocab/unit/PPM, mg/Kg"
},
{
"type": "BiologicalProperty",
"identifier": 15,
"name": "Organic Carbon Content",
"unitText": "dg/kg, g/kg, %",
"unitCode": "dg/kg, https://qudt.org/vocab/unit/GM-PER-KiloGM, https://qudt.org/vocab/unit/PERCENT"
},
{
"type": "BiologicalProperty",
"identifier": 27,
"name": "Organic Matter",
"unitText": "%",
"unitCode": "https://qudt.org/vocab/unit/PERCENT"
},
{
"type": "ChemicalProperty",
"identifier": 1,
"name": "pH",
"unitText": "pHx10",
"unitCode": "pHx10"
},
{
"type": "ChemicalProperty",
"identifier": 4,
"name": "Phosphorus",
"unitText": "ppm, mg/kg, g/kg",
"unitCode": "https://qudt.org/vocab/unit/PPM, https://qudt.org/vocab/unit/MilliGM-PER-KiloGM, https://qudt.org/vocab/unit/GM-PER-KiloGM"
},
{
"type": "ChemicalProperty",
"identifier": 5,
"name": "Potassium",
"unitText": "mg/kg, ppm",
"unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM, https://qudt.org/vocab/unit/PPM"
},
{
"type": "ChemicalProperty",
"identifier": 54,
"name": "Potassium Saturation"
},
{
"type": "PhysicalProperty",
"identifier": 62,
"name": "Rock Horizon",
"unitText": "cm, m",
"unitCode": "https://qudt.org/vocab/unit/CentiM, m"
},
{
"type": "PhysicalProperty",
"identifier": 12,
"name": "sand",
"unitText": "g/kg, g/100g, %",
"unitCode": "https://qudt.org/vocab/unit/GM-PER-KiloGM, g/100g, https://qudt.org/vocab/unit/PERCENT"
},
{
"type": "ChemicalProperty",
"identifier": 80,
"name": "Silicium"
},
{
"type": "PhysicalProperty",
"identifier": 11,
"name": "silt",
"unitText": "g/kg, g/100g, %",
"unitCode": "https://qudt.org/vocab/unit/GM-PER-KiloGM, g/100g, https://qudt.org/vocab/unit/PERCENT"
},
{
"type": "ChemicalProperty",
"identifier": 28,
"name": "Sodium",
"unitText": "mg/kg, ppm",
"unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM, https://qudt.org/vocab/unit/PPM"
},
{
"type": "ChemicalProperty",
"identifier": 81,
"name": "Sodium Saturation"
},
{
"type": "DerivedProperty",
"identifier": 33,
"name": "Soil Organic Carbon Density",
"unitText": "hg/m3, mg/dm3",
"unitCode": "hg/m3, mg/dm3"
},
{
"type": "DerivedProperty",
"identifier": 32,
"name": "Soil Organic Carbon Stock",
"unitText": "t/ha, g/m2",
"unitCode": "https://qudt.org/vocab/unit/TONNE-PER-HA, g/m2"
},
{
"type": "ChemicalProperty",
"identifier": 22,
"name": "Sulfur",
"unitText": "ppm, mg/kg, g/kg",
"unitCode": "https://qudt.org/vocab/unit/PPM, https://qudt.org/vocab/unit/MilliGM-PER-KiloGM, https://qudt.org/vocab/unit/GM-PER-KiloGM"
},
{
"type": "DerivedProperty",
"identifier": 35,
"name": "USDA Texture"
},
{
"type": "PhysicalProperty",
"identifier": 34,
"name": "Water Content"
},
{
"type": "PhysicalProperty",
"identifier": 48,
"name": "Water Retention Gravimetric",
"unitText": "g/100g",
"unitCode": "g/100g"
},
{
"type": "PhysicalProperty",
"identifier": 49,
"name": "Water Retention Volumetric",
"unitText": "cm3/100cm3",
"unitCode": "cm3/100cm3"
},
{
"type": "ChemicalProperty",
"identifier": 23,
"name": "Zinc",
"unitText": "mg/kg, ppm, 100ppm",
"unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM, https://qudt.org/vocab/unit/PPM, 100ppm"
}
],
"@context": "https://api.soilhive.ag/v1/core.jsonld"
}
Out of the 46 returned properties, only some are relevant for this use case. Inspecting the response, we take note of the identifiers:
| Soil property | Identifier |
|---|---|
| Aluminium | 6 |
| Base Saturation | 42 |
| Calcium Saturation | 50 |
| CEC | 9 |
| Clay (%) | 10 |
| Iron | 7 |
| Magnesium Saturation | 51 |
| Manganese | 21 |
| Organic Carbon Content | 15 |
| Organic Matter | 27 |
| pH | 1 |
| Sand (%) | 12 |
| Silt (%) | 11 |
Step 4: Get the list of datasets given the area of interest and the selected properties
Payload should now contain geometry and soilProperties, which is an array containing the integer identifiers from previous API call (Step 3).
curl --request POST \
--url https://api.soilhive.ag/v1/datasets/queries \
--header 'accept: application/ld+json' \
--header 'authorization: Bearer {token}' \
--header 'content-type: application/json' \
--data '
{
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'
{
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"@id": "https://api.soilhive.ag/v1/datasets",
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{
"@id": "https://api.soilhive.ag/v1/datasets/25",
"identifier": 25,
"type": "DataSet",
"name": "Africa SoilGrids nutrients",
"abstract": "The African Soil Information Service (AfSIS), managed by ISRIC – World Soil Information, is an initiative designed to enhance soil data and information across Sub-Saharan Africa. It aims to support sustainable land management and agricultural productivity by creating detailed soil maps and databases. AfSIS's data collection encompasses a diverse range of samples, including 18,000 specimens from 60 sentinel sites across Sub-Saharan Africa, covering soil depths from 0-20 cm and 20-50 cm. Additionally, the service has amassed 60,000 samples from 18,500 soil profiles distributed across 40 countries. This extensive dataset is further enriched by contributions from various sources such as EthioSIS, GhaSIS, NiSIS, IFDC, the One Acre Fund, the University of California, Davis, and VitalSigns, ensuring a robust and multifarious soil information system. AfSIS integrates remote sensing techniques, digital soil mapping, and geospatial data to produce detailed and actionable soil information. These technological tools enable the creation of soil maps and facilitate a better understanding of soil properties and their spatial distribution. The initiative was founded by Bill & Melinda Gates Foundation, with the support of the International Fund for Agricultural Development (IFAD), the World Bank, and the European Union.",
"url": "https://files.isric.org/public/af250m_nutrient/",
"datePublished": "2016-05-12",
"temporalCoverage": "1980/2016",
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"author": { "type": "Organization", "name": "ISRIC - World Soil Information", "url": "https://www.isric.org/" },
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{ "type": "PropertyValue", "identifier": 6, "name": "af250m_nutrient_al_m_agg30cm ", "description": "extractable alumiunim (Al) by Mehlich 3 at 0-30 cm depth", "unitText": "ppm", "unitCode": "https://qudt.org/vocab/unit/PPM" },
{ "type": "PropertyValue", "identifier": 19, "name": "af250m_nutrient_b_m_agg30cm ", "description": "extractable boron (B) by Mehlich 3 at 0-30 cm depth", "unitText": "100ppm", "unitCode": "100ppm" },
{ "type": "PropertyValue", "identifier": 30, "name": "af250m_nutrient_ca_m_agg30cm ", "description": "extractable Calcium (Ca) by Mehlich 3 at 0-30 cm depth", "unitText": "ppm", "unitCode": "https://qudt.org/vocab/unit/PPM" },
{ "type": "PropertyValue", "identifier": 20, "name": "af250m_nutrient_cu_m_agg30cm ", "description": "extractable Cupper (Cu) by Mehlich 3 at 0-30 cm depth", "unitText": "100ppm", "unitCode": "100ppm" },
{ "type": "PropertyValue", "identifier": 7, "name": "af250m_nutrient_fe_m_agg30cm ", "description": "extractable iron (Fe) by Mehlich 3 at 0-30 cm depth", "unitText": "100ppm", "unitCode": "100ppm" },
{ "type": "PropertyValue", "identifier": 5, "name": "af250m_nutrient_k_m_agg30cm ", "description": "extractable Potassium (K) by Mehlich 3 at 0-30 cm depth", "unitText": "ppm", "unitCode": "https://qudt.org/vocab/unit/PPM" },
{ "type": "PropertyValue", "identifier": 31, "name": "af250m_nutrient_mg_m_agg30cm ", "description": "extractable Magnesium (Mg) by Mehlich 3 at 0-30 cm depth", "unitText": "ppm", "unitCode": "https://qudt.org/vocab/unit/PPM" },
{ "type": "PropertyValue", "identifier": 21, "name": "af250m_nutrient_mn_m_agg30cm ", "description": "extractable Manganese (Mn) by Mehlich 3 at 0-30 cm depth", "unitText": "100ppm", "unitCode": "100ppm" },
{ "type": "PropertyValue", "identifier": 3, "name": "af250m_nutrient_n_m_agg30cm ", "description": "total Nitrogen (N) by wet oxidation at 0-30 cm depth", "unitText": "ppm", "unitCode": "https://qudt.org/vocab/unit/PPM" },
{ "type": "PropertyValue", "identifier": 28, "name": "af250m_nutrient_na_m_agg30cm ", "description": "extractable Sodium (Na) by Mehlich 3 at 0-30 cm depth", "unitText": "ppm", "unitCode": "https://qudt.org/vocab/unit/PPM" },
{ "type": "PropertyValue", "identifier": 4, "name": "af250m_nutrient_p_m_agg30cm ", "description": "extractable Phosphorus (P) by Mehlich at 0-30 cm depth", "unitText": "ppm", "unitCode": "https://qudt.org/vocab/unit/PPM" },
{ "type": "PropertyValue", "identifier": 4, "name": "af250m_nutrient_p_t_m_agg30cm ", "description": "total phosphorus (P) by unspecified methods at 0-30 cm depth", "unitText": "ppm", "unitCode": "https://qudt.org/vocab/unit/PPM" },
{ "type": "PropertyValue", "identifier": 23, "name": "af250m_nutrient_zn_m_agg30cm ", "description": "extractable Zinc (Zn) by Mehlich 3 at 0-30 cm depth", "unitText": "100ppm", "unitCode": "100ppm" }
],
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"citation": "Hengl, T., Leenaars, J.G.B., Shepherd, K.D., Walsh, M.G, Heuvelink, G.B.M., Mamo, T. et al. (2017) [Soil nutrient maps of Sub-Saharan Africa: assessment of soil nutrient content at 250 m spatial resolution using machine learning] (https://link.springer.com/content/pdf/10.1007/s10705-017-9870-x.pdf). Nutrient Cycling in Agroecosystems, DOI: 10.1007/s10705-017-9870-x.",
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{
"@id": "https://api.soilhive.ag/v1/datasets/31",
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"abstract": "Over the period 2008–2014, the AfSIS project has compiled two soil profiles / samples datasets: the Africa Soil Profiles database holding legacy soil profiles data and the Sentinel Sites database holding newly collected topsoil data, jointly consisting of around 28 thousand sampling locations and a total of 85 thousands samples. Using these soil point observations & measurements and an extensive collection of global (SoilGrids1km) and continental (Africa) environmental covariates, ISRIC - World Soil Information, in collaboration with The Earth Institute, Columbia University, World Agroforestry Centre, Nairobi and the International Center for Tropical Agriculture (CIAT), has produced predictions of soil properties for the whole African continent at 250 m spatial resolution at either two or six standard soil depths.",
"url": "https://files.isric.org/public/af250m_nutrient/",
"datePublished": "2015-02-10",
"temporalCoverage": "1960/2015",
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},
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{
"type": "PropertyValue",
"identifier": 14,
"name": "af_CRFVOL_T__M_s_5_15_cm_250m",
"description": "Volumetric coarse fragments content (estimated in the field) in v% (m3/100m3) at 5-15 cm depths predicted using the Africa Soil Profiles Database (AfSP)",
"unitText": "m3/100m3",
"unitCode": "m3/100m3"
},
{
"type": "PropertyValue",
"identifier": 14,
"name": "af_CRFVOL_T__M_s_60_100_cm_250m",
"description": "Volumetric coarse fragments content (estimated in the field) in v% (m3/100m3) at 60-100 cm depths predicted using the Africa Soil Profiles Database (AfSP)",
"unitText": "m3/100m3",
"unitCode": "m3/100m3"
},
{
"type": "PropertyValue",
"identifier": 29,
"name": "af_EACKCL_T__M_s_0_5_cm_250m",
"description": "Exchangeable acidity (H+Al measured in 1M KCl) in cmolc/kg (fine earth) at 0-5 cm depths predicted using two sets of Africa soil profiles data",
"unitText": "cmolc/kg",
"unitCode": "cmolc/kg"
},
{
"type": "PropertyValue",
"identifier": 29,
"name": "af_EACKCL_T__M_s_100_200_cm_250m",
"description": "Exchangeable acidity (H+Al measured in 1M KCl) in cmolc/kg (fine earth) at 100-200 cm depths predicted using two sets of Africa soil profiles data",
"unitText": "cmolc/kg",
"unitCode": "cmolc/kg"
},
{
"type": "PropertyValue",
"identifier": 29,
"name": "af_EACKCL_T__M_s_15_30_cm_250m",
"description": "Exchangeable acidity (H+Al measured in 1M KCl) in cmolc/kg (fine earth) at15-30 cm depths predicted using two sets of Africa soil profiles data",
"unitText": "cmolc/kg",
"unitCode": "cmolc/kg"
},
{
"type": "PropertyValue",
"identifier": 29,
"name": "af_EACKCL_T__M_s_30_60_cm_250m",
"description": "Exchangeable acidity (H+Al measured in 1M KCl) in cmolc/kg (fine earth) at 30-60 cm depths predicted using two sets of Africa soil profiles data",
"unitText": "cmolc/kg",
"unitCode": "cmolc/kg"
},
{
"type": "PropertyValue",
"identifier": 29,
"name": "af_EACKCL_T__M_s_5_15_cm_250m",
"description": "Exchangeable acidity (H+Al measured in 1M KCl) in cmolc/kg (fine earth) at 5-15 cm depths predicted using two sets of Africa soil profiles data",
"unitText": "cmolc/kg",
"unitCode": "cmolc/kg"
},
{
"type": "PropertyValue",
"identifier": 29,
"name": "af_EACKCL_T__M_s_60_100_cm_250m",
"description": "Exchangeable acidity (H+Al measured in 1M KCl) in cmolc/kg (fine earth) at 60-100 cm depths predicted using two sets of Africa soil profiles data",
"unitText": "cmolc/kg",
"unitCode": "cmolc/kg"
},
{
"type": "PropertyValue",
"identifier": 30,
"name": "af_ECAX_T__M_x_0_20_cm_250m",
"description": "Exchangeable calcium (Ca2+; measured in 1M NH4OAc buffered at pH 7 with part of the data converted from data measured according to Mehlich 3) in cmolc/kg (fine earth) at at 0-20 cm depth predicted using two Africa soil profiles datasets",
"unitText": "cmolc/kg",
"unitCode": "cmolc/kg"
},
{
"type": "PropertyValue",
"identifier": 30,
"name": "af_ECAX_T__M_x_20_50_cm_250m",
"description": "Exchangeable calcium (Ca2+; measured in 1M NH4OAc buffered at pH 7 with part of the data converted from data measured according to Mehlich 3) in cmolc/kg (fine earth) at 20-50 cm depth predicted using two Africa soil profiles datasets",
"unitText": "cmolc/kg",
"unitCode": "cmolc/kg"
},
{
"type": "PropertyValue",
"identifier": 31,
"name": "af_EMGX_T__M_x_0_20_cm_250m",
"description": "Exchangeable magnesium (Mg2+ measured in 1M NH4OAc buffered at pH 7 with part of the data converted from data measured according to Mehlich 3) in cmolc/kg (fine earth) at 0-20 cm depth predicted using two Africa soil profiles datasets. ",
"unitText": "cmolc/kg",
"unitCode": "cmolc/kg"
},
{
"type": "PropertyValue",
"identifier": 31,
"name": "af_EMGX_T__M_x_20_50_cm_250m",
"description": "Exchangeable magnesium (Mg2+ measured in 1M NH4OAc buffered at pH 7 with part of the data converted from data measured according to Mehlich 3) in cmolc/kg (fine earth) at 20-50 cm depth predicted using two Africa soil profiles datasets. ",
"unitText": "cmolc/kg",
"unitCode": "cmolc/kg"
},
{
"type": "PropertyValue",
"identifier": 28,
"name": "af_ENAX_T__M_x_0_20_cm_250m",
"description": "Exchangeable sodium (Na+ measured in 1M NH4OAc buffered at pH 7 with part of the data converted from data measured according to Mehlich 3) in cmolc/kg (fine earth) at 0-20 cm depth predicted using two Africa soil profiles datasets",
"unitText": "cmolc/kg",
"unitCode": "cmolc/kg"
},
{
"type": "PropertyValue",
"identifier": 28,
"name": "af_ENAX_T__M_x_20_50_cm_250m",
"description": "Exchangeable sodium (Na+ measured in 1M NH4OAc buffered at pH 7 with part of the data converted from data measured according to Mehlich 3) in cmolc/kg (fine earth) at 20-50 cm depth predicted using two Africa soil profiles datasets",
"unitText": "cmolc/kg",
"unitCode": "cmolc/kg"
},
{
"type": "PropertyValue",
"identifier": 24,
"name": "af_EXBX_T__M_s_0_5_cm_250m",
"description": "Sum of exchangeable bases (Ca2+, Mg2+, K+, Na+ measured in 1M NH4OAc buffered at pH 7 with part of the data converted from data measured according to Mehlich 3) in cmolc/kg (fine earth) at 0-5 cm depth predicted using two Africa soil profiles datasets",
"unitText": "cmolc/kg",
"unitCode": "cmolc/kg"
},
{
"type": "PropertyValue",
"identifier": 24,
"name": "af_EXBX_T__M_s_100_200_cm_250m",
"description": "Sum of exchangeable bases (Ca2+, Mg2+, K+, Na+ measured in 1M NH4OAc buffered at pH 7 with part of the data converted from data measured according to Mehlich 3) in cmolc/kg (fine earth) at 100-200 cm depth predicted using two Africa soil profiles datasets",
"unitText": "cmolc/kg",
"unitCode": "cmolc/kg"
},
{
"type": "PropertyValue",
"identifier": 24,
"name": "af_EXBX_T__M_s_15_30_cm_250m",
"description": "Sum of exchangeable bases (Ca2+, Mg2+, K+, Na+ measured in 1M NH4OAc buffered at pH 7 with part of the data converted from data measured according to Mehlich 3) in cmolc/kg (fine earth) at 15-30 cm depth predicted using two Africa soil profiles datasets",
"unitText": "cmolc/kg",
"unitCode": "cmolc/kg"
},
{
"type": "PropertyValue",
"identifier": 24,
"name": "af_EXBX_T__M_s_30_60_cm_250m",
"description": "Sum of exchangeable bases (Ca2+, Mg2+, K+, Na+ measured in 1M NH4OAc buffered at pH 7 with part of the data converted from data measured according to Mehlich 3) in cmolc/kg (fine earth) at 30-60 cm depth predicted using two Africa soil profiles datasets",
"unitText": "cmolc/kg",
"unitCode": "cmolc/kg"
},
{
"type": "PropertyValue",
"identifier": 24,
"name": "af_EXBX_T__M_s_5_15_cm_250m",
"description": "Sum of exchangeable bases (Ca2+, Mg2+, K+, Na+ measured in 1M NH4OAc buffered at pH 7 with part of the data converted from data measured according to Mehlich 3) in cmolc/kg (fine earth) at 5-15 cm depth predicted using two Africa soil profiles datasets",
"unitText": "cmolc/kg",
"unitCode": "cmolc/kg"
},
{
"type": "PropertyValue",
"identifier": 24,
"name": "af_EXBX_T__M_s_60_100_cm_250m",
"description": "Sum of exchangeable bases (Ca2+, Mg2+, K+, Na+ measured in 1M NH4OAc buffered at pH 7 with part of the data converted from data measured according to Mehlich 3) in cmolc/kg (fine earth) at 60-100 cm depth predicted using two Africa soil profiles datasets",
"unitText": "cmolc/kg",
"unitCode": "cmolc/kg"
},
{
"type": "PropertyValue",
"identifier": 5,
"name": "af_EXKX_T__M_x_0_20_cm_250m",
"description": "Exchangeable potassium (K+; measured in 1M NH4OAc buffered at pH 7 with part of the data converted from data measured according to Mehlich 3) in cmolc/kg (fine earth) at 2 depth intervals (0-20 cm and 20-50 cm) predicted using two Africa soil profiles datasets",
"unitText": "cmolc/kg",
"unitCode": "cmolc/kg"
},
{
"type": "PropertyValue",
"identifier": 5,
"name": "af_EXKX_T__M_x_20_50_cm_250m",
"description": "Exchangeable potassium (K+; measured in 1M NH4OAc buffered at pH 7 with part of the data converted from data measured according to Mehlich 3) in cmolc/kg (fine earth) at 2 depth intervals (0-20 cm and 20-50 cm) predicted using two Africa soil profiles datasets",
"unitText": "cmolc/kg",
"unitCode": "cmolc/kg"
},
{
"type": "PropertyValue",
"identifier": 3,
"name": "af_NTO_T__M_x_0_20_cm_250m",
"description": "Total nitrogen (N) content in g/kg of the fine earth fraction at 0-20 cm depth measured according to the analytical procedures of wet oxidation and predicted using two sets of Africa soil profiles data.",
"unitText": "g/kg",
"unitCode": "https://qudt.org/vocab/unit/GM-PER-KiloGM"
},
{
"type": "PropertyValue",
"identifier": 3,
"name": "af_NTO_T__M_x_20_50_cm_250m",
"description": "Total nitrogen (N) content in g/kg of the fine earth fraction at 20-50 cm depth measured according to the analytical procedures of wet oxidation and predicted using two sets of Africa soil profiles data.",
"unitText": "g/kg",
"unitCode": "https://qudt.org/vocab/unit/GM-PER-KiloGM"
},
{
"type": "PropertyValue",
"identifier": 15,
"name": "af_ORCDRC_T__M_s_0_5_cm_250m",
"description": "Soil organic carbon content (measured by either wet oxidation or dry combustion at 900 C) in g/kg (fine earth) at 0-5 cm depths predicted using two sets of Africa soil profiles data.",
"unitText": "g/kg",
"unitCode": "https://qudt.org/vocab/unit/GM-PER-KiloGM"
},
{
"type": "PropertyValue",
"identifier": 15,
"name": "af_ORCDRC_T__M_s_100_200_cm_250m",
"description": "Soil organic carbon content (measured by either wet oxidation or dry combustion at 900 C) in g/kg (fine earth) at 100-200 cm depths predicted using two sets of Africa soil profiles data.",
"unitText": "g/kg",
"unitCode": "https://qudt.org/vocab/unit/GM-PER-KiloGM"
},
{
"type": "PropertyValue",
"identifier": 15,
"name": "af_ORCDRC_T__M_s_15_30_cm_250m",
"description": "Soil organic carbon content (measured by either wet oxidation or dry combustion at 900 C) in g/kg (fine earth) at 15-30 cm depths predicted using two sets of Africa soil profiles data.",
"unitText": "g/kg",
"unitCode": "https://qudt.org/vocab/unit/GM-PER-KiloGM"
},
{
"type": "PropertyValue",
"identifier": 15,
"name": "af_ORCDRC_T__M_s_30_60_cm_250m",
"description": "Soil organic carbon content (measured by either wet oxidation or dry combustion at 900 C) in g/kg (fine earth) at 30-60 cm depths predicted using two sets of Africa soil profiles data.",
"unitText": "g/kg",
"unitCode": "https://qudt.org/vocab/unit/GM-PER-KiloGM"
},
{
"type": "PropertyValue",
"identifier": 15,
"name": "af_ORCDRC_T__M_s_5_15_cm_250m",
"description": "Soil organic carbon content (measured by either wet oxidation or dry combustion at 900 C) in g/kg (fine earth) at 5-15 cm depths predicted using two sets of Africa soil profiles data.",
"unitText": "g/kg",
"unitCode": "https://qudt.org/vocab/unit/GM-PER-KiloGM"
},
{
"type": "PropertyValue",
"identifier": 15,
"name": "af_ORCDRC_T__M_s_60_100_cm_250m",
"description": "Soil organic carbon content (measured by either wet oxidation or dry combustion at 900 C) in g/kg (fine earth) at 60-100 cm depths predicted using two sets of Africa soil profiles data.",
"unitText": "g/kg",
"unitCode": "https://qudt.org/vocab/unit/GM-PER-KiloGM"
},
{
"type": "PropertyValue",
"identifier": 1,
"name": "af_PHIHOX_T__M_s_0_5_cm_250m",
"description": "Soil pH x 10 in H2O at 0-5 cm depths (to convert to pH values divide by 10) predicted using two sets of Africa soil profiles data",
"unitText": "pHx10",
"unitCode": "pHx10"
},
{
"type": "PropertyValue",
"identifier": 1,
"name": "af_PHIHOX_T__M_s_100_200_cm_250m",
"description": "Soil pH x 10 in H2O at 100-200 cm depths (to convert to pH values divide by 10) predicted using two sets of Africa soil profiles data",
"unitText": "pHx10",
"unitCode": "pHx10"
},
{
"type": "PropertyValue",
"identifier": 1,
"name": "af_PHIHOX_T__M_s_15_30_cm_250m",
"description": "Soil pH x 10 in H2O at 15-30 cm depths (to convert to pH values divide by 10) predicted using two sets of Africa soil profiles data",
"unitText": "pHx10",
"unitCode": "pHx10"
},
{
"type": "PropertyValue",
"identifier": 1,
"name": "af_PHIHOX_T__M_s_30_60_cm_250m",
"description": "Soil pH x 10 in H2O at 30-60 cm depths (to convert to pH values divide by 10) predicted using two sets of Africa soil profiles data",
"unitText": "pHx10",
"unitCode": "pHx10"
},
{
"type": "PropertyValue",
"identifier": 1,
"name": "af_PHIHOX_T__M_s_5_15_cm_250m",
"description": "Soil pH x 10 in H2O at 5-15 cm depths (to convert to pH values divide by 10) predicted using two sets of Africa soil profiles data",
"unitText": "pHx10",
"unitCode": "pHx10"
},
{
"type": "PropertyValue",
"identifier": 1,
"name": "af_PHIHOX_T__M_s_60_100_cm_250m",
"description": "Soil pH x 10 in H2O at 60-100 cm depths (to convert to pH values divide by 10) predicted using two sets of Africa soil profiles data",
"unitText": "pHx10",
"unitCode": "pHx10"
},
{
"type": "PropertyValue",
"identifier": 11,
"name": "af_SLTPPT_T__M_s_0_5_cm_250m",
"description": "Silt content (2-50 micro meter) in g/100g (w%) at 0-5 cm depth predicted using two sets of Africa soil profiles data.",
"unitText": "g/100g",
"unitCode": "g/100g"
},
{
"type": "PropertyValue",
"identifier": 11,
"name": "af_SLTPPT_T__M_s_100_200_cm_250m",
"description": "Silt content (2-50 micro meter) in g/100g (w%) at 100-200 cm depth predicted using two sets of Africa soil profiles data.",
"unitText": "g/100g",
"unitCode": "g/100g"
},
{
"type": "PropertyValue",
"identifier": 11,
"name": "af_SLTPPT_T__M_s_15_30_cm_250m",
"description": "Silt content (2-50 micro meter) in g/100g (w%) at 15-30 cm depth predicted using two sets of Africa soil profiles data.",
"unitText": "g/100g",
"unitCode": "g/100g"
},
{
"type": "PropertyValue",
"identifier": 11,
"name": "af_SLTPPT_T__M_s_30_60_cm_250m",
"description": "Silt content (2-50 micro meter) in g/100g (w%) at 30-60 cm depth predicted using two sets of Africa soil profiles data.",
"unitText": "g/100g",
"unitCode": "g/100g"
},
{
"type": "PropertyValue",
"identifier": 11,
"name": "af_SLTPPT_T__M_s_5_15_cm_250m",
"description": "Silt content (2-50 micro meter) in g/100g (w%) at 5-15 cm depth predicted using two sets of Africa soil profiles data.",
"unitText": "g/100g",
"unitCode": "g/100g"
},
{
"type": "PropertyValue",
"identifier": 11,
"name": "af_SLTPPT_T__M_s_60_100_cm_250m",
"description": "Silt content (2-50 micro meter) in g/100g (w%) at 60-100 cm depth predicted using two sets of Africa soil profiles data.",
"unitText": "g/100g",
"unitCode": "g/100g"
},
{
"type": "PropertyValue",
"identifier": 12,
"name": "af_SNDPPT_T__M_s_0_5_cm_250m",
"description": "Sand content (50-2000 micro meter) in g/100g (w%) at 0-5 cm depths predicted using two sets of Africa soil profiles data.",
"unitText": "g/100g",
"unitCode": "g/100g"
},
{
"type": "PropertyValue",
"identifier": 12,
"name": "af_SNDPPT_T__M_s_100_200_cm_250m",
"description": "Sand content (50-2000 micro meter) in g/100g (w%) at 100-200 cm depths predicted using two sets of Africa soil profiles data.",
"unitText": "g/100g",
"unitCode": "g/100g"
},
{
"type": "PropertyValue",
"identifier": 12,
"name": "af_SNDPPT_T__M_s_15_30_cm_250m",
"description": "Sand content (50-2000 micro meter) in g/100g (w%) at 15-30 cm depths predicted using two sets of Africa soil profiles data.",
"unitText": "g/100g",
"unitCode": "g/100g"
},
{
"type": "PropertyValue",
"identifier": 12,
"name": "af_SNDPPT_T__M_s_30_60_cm_250m",
"description": "Sand content (50-2000 micro meter) in g/100g (w%) at 30-60 cm depths predicted using two sets of Africa soil profiles data.",
"unitText": "g/100g",
"unitCode": "g/100g"
},
{
"type": "PropertyValue",
"identifier": 12,
"name": "af_SNDPPT_T__M_s_5_15_cm_250m",
"description": "Sand content (50-2000 micro meter) in g/100g (w%) at 5-15 cm depths predicted using two sets of Africa soil profiles data.",
"unitText": "g/100g",
"unitCode": "g/100g"
},
{
"type": "PropertyValue",
"identifier": 12,
"name": "af_SNDPPT_T__M_s_60_100_cm_250m",
"description": "Sand content (50-2000 micro meter) in g/100g (w%) at 60-100 cm depths predicted using two sets of Africa soil profiles data.",
"unitText": "g/100g",
"unitCode": "g/100g"
}
],
"measurementTechnique": { "type": "DefinedTerm", "name": "D2.8.III.3 INSPIRE Data Specification on Soil, soil profile category", "termCode": "DerivedSoilProfile", "url": "https://inspire.ec.europa.eu/featureconcept/DerivedSoilProfile" },
"gisDataType": { "description": "GIS data type describes the original format. It can be either point, polygonal, raster", "value": "raster" },
"distribution": { "type": "DataDownload", "encodingFormat": "TIF", "lockedForDownload": false },
"size": { "type": "QuantitativeValue", "value": "73", "unitCode": "files" },
"license": { "type": "CreativeWork", "name": "CC BY-NC 3.0", "url": "https://creativecommons.org/licenses/by-nc/3.0/" },
"citation": "Hengl T, Heuvelink GBM, Kempen B, Leenaars JGB, Walsh MG, Shepherd KD, et al. (2015) Mapping Soil Properties of Africa at 250 m Resolution: Random Forests Significantly Improve Current Predictions PLoS ONE 10(6): e0125814. doi:10.1371/journal.pone.0125814",
"parentProject": null
},
{
"@id": "https://api.soilhive.ag/v1/datasets/38",
"identifier": 38,
"type": "DataSet",
"name": "CAROB Project - Soil Samples",
"abstract": "CAROB is a community project that uses a collaborative and open-source approach to standardize and compile open agricultural research data from experiments and surveys. The goal is to facilitate the further use of these data in research and development. The project compiled agricultural research data into groups with similar variables. This resource (\"soil_samples\") combines 10 standardized individual data sources, aggregating several soil biological, chemical, and physical parameters from 76 countries into a comprehensive dataset.<br/><br/>During the data cleaning process, the SoilHive team dropped some points that either didn’t have information for the soil properties we retain or fell on water. Additionally, some records in the dataset have low-precision coordinates. Users are advised to consider this limitation when working with the data and consult the <a href=\"https://www.soilhive.ag/#faqs\" target=\"_blank\">FAQ</a> for further details. The full dataset, comprehensive of data beyond the soil domain, can be found at <a href=\"https://carob-data.org/data.html\" target=\"_blank\">carob-data.org</a>.",
"url": "https://carob-data.org/data.html",
"datePublished": "2024-12-10",
"version": "-",
"author": { "type": "Organization", "name": "See all contributors here", "url": "https://carob-data.org/contributors.html" },
"publisher": { "type": "Organization", "name": "See all contributors here", "url": "https://carob-data.org/contributors.html" },
"status": { "description": "Dataset status in the system", "value": "ingested" },
"spatialCoverage": { "name": "global", "spatialResolution": "-" },
"variableMeasured": [
{ "type": "PropertyValue", "identifier": 1, "name": "soil_pH", "description": "soil pH (H2O)" },
{ "type": "PropertyValue", "identifier": 1, "name": "soil_pH_KCl", "description": "soil pH (KCl)" },
{ "type": "PropertyValue", "identifier": 1, "name": "soil_pH_CaCl2", "description": "soil pH (CaCl2)" },
{ "type": "PropertyValue", "identifier": 15, "name": "soil_SOC", "description": "soil organic carbon", "unitText": "%", "unitCode": "https://qudt.org/vocab/unit/PERCENT" },
{ "type": "PropertyValue", "identifier": 12, "name": "soil_sand", "description": "soil sand content (excluding gravel)", "unitText": "%", "unitCode": "https://qudt.org/vocab/unit/PERCENT" },
{ "type": "PropertyValue", "identifier": 10, "name": "soil_clay", "description": "soil clay content (excluding gravel)", "unitText": "%", "unitCode": "https://qudt.org/vocab/unit/PERCENT" },
{ "type": "PropertyValue", "identifier": 11, "name": "soil_silt", "description": "soil silt content (excluding gravel)", "unitText": "%", "unitCode": "https://qudt.org/vocab/unit/PERCENT" },
{ "type": "PropertyValue", "identifier": 3, "name": "soil_N", "description": "soil N content", "unitText": "mg/kg", "unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM" },
{ "type": "PropertyValue", "identifier": 5, "name": "soil_K", "description": "soil K content", "unitText": "mg/kg", "unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM" },
{ "type": "PropertyValue", "identifier": 4, "name": "soil_P_total", "description": "soil P (total) ", "unitText": "mg/kg", "unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM" },
{ "type": "PropertyValue", "identifier": 4, "name": "soil_P_available", "description": "soil P (plant available) ", "unitText": "mg/kg", "unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM" },
{ "type": "PropertyValue", "identifier": 30, "name": "soil_Ca", "description": "soil Ca content", "unitText": "mg/kg", "unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM" },
{ "type": "PropertyValue", "identifier": 31, "name": "soil_Mg", "description": "soil Mg content", "unitText": "mg/kg", "unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM" },
{ "type": "PropertyValue", "identifier": 19, "name": "soil_B", "description": "soil B content", "unitText": "mg/kg", "unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM" },
{ "type": "PropertyValue", "identifier": 20, "name": "soil_Cu", "description": "soil Cu content", "unitText": "mg/kg", "unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM" },
{ "type": "PropertyValue", "identifier": 21, "name": "soil_Mn", "description": "soil Mn content", "unitText": "mg/kg", "unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM" },
{ "type": "PropertyValue", "identifier": 7, "name": "soil_Fe", "description": "soil Fe content", "unitText": "mg/kg", "unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM" },
{ "type": "PropertyValue", "identifier": 22, "name": "soil_S", "description": "soil S content", "unitText": "mg/kg", "unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM" },
{ "type": "PropertyValue", "identifier": 23, "name": "soil_Zn", "description": "soil Zn content", "unitText": "mg/kg", "unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM" },
{ "type": "PropertyValue", "identifier": 28, "name": "soil_Na", "description": "soil Na content", "unitText": "mg/kg", "unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM" },
{ "type": "PropertyValue", "identifier": 6, "name": "soil_Al", "description": "soil Al content", "unitText": "mg/kg", "unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM" },
{ "type": "PropertyValue", "identifier": 18, "name": "soil_C", "description": "soil C content", "unitText": "%", "unitCode": "https://qudt.org/vocab/unit/PERCENT" },
{ "type": "PropertyValue", "identifier": 2, "name": "soil_EC", "description": "soil electric conductivity", "unitText": "mS/cm", "unitCode": "mS/cm" },
{ "type": "PropertyValue", "identifier": 13, "name": "soil_bd", "description": "soil bulk density", "unitText": "g/cm3", "unitCode": "https://qudt.org/vocab/unit/GM-PER-CentiM3" },
{ "type": "PropertyValue", "identifier": 9, "name": "soil_CEC", "description": "Cation Exchange Capacity", "unitText": "cmol/kg", "unitCode": "https://qudt.org/vocab/unit/CentiMOL-PER-KiloGM" },
{ "type": "PropertyValue", "identifier": 9, "name": "soil_ECEC", "description": "Effective Cation Exchange Capacity", "unitText": "cmol/kg", "unitCode": "https://qudt.org/vocab/unit/CentiMOL-PER-KiloGM" },
{ "type": "PropertyValue", "identifier": 30, "name": "soil_ex_Ca", "description": "soil exchangeable Ca", "unitText": "mg/kg", "unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM" },
{ "type": "PropertyValue", "identifier": 31, "name": "soil_ex_Mg", "description": "soil exchangeable Mg", "unitText": "mg/kg", "unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM" },
{ "type": "PropertyValue", "identifier": 5, "name": "soil_ex_K", "description": "soil exchangeable K", "unitText": "mg/kg", "unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM" },
{ "type": "PropertyValue", "identifier": 28, "name": "soil_ex_Na", "description": "soil exchangeable Na", "unitText": "mg/kg", "unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM" },
{ "type": "PropertyValue", "identifier": 6, "name": "soil_ex_Al", "description": "soil exchangeable Al", "unitText": "mg/kg", "unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM" },
{ "type": "PropertyValue", "identifier": 78, "name": "soil_PSI", "description": "phosphorous sorption index" },
{ "type": "PropertyValue", "identifier": 29, "name": "soil_ex_acidity", "description": "soil exchangeable acidity", "unitText": "%", "unitCode": "https://qudt.org/vocab/unit/PERCENT" }
],
"measurementTechnique": { "type": "DefinedTerm", "name": "D2.8.III.3 INSPIRE Data Specification on Soil, soil profile category", "termCode": "ObservedSoilProfile", "url": "https://inspire.ec.europa.eu/featureconcept/ObservedSoilProfile" },
"gisDataType": { "description": "GIS data type describes the original format. It can be either point, polygonal, raster", "value": "point" },
"distribution": { "type": "DataDownload", "encodingFormat": "GeoJSON", "lockedForDownload": false },
"size": { "type": "QuantitativeValue", "value": "11388", "unitCode": "data points" },
"license": { "type": "CreativeWork", "name": "CC BY 4.0 & CC BY-NC-SA-3.0", "url": "https://creativecommons.org/licenses/by/4.0/deed.en" },
"citation": "CAROB Project (2024). CAROB Project - Soil Samples [Data set]. CAROB. https://carob-data.org/data.html",
"parentProject": null
},
{
"@id": "https://api.soilhive.ag/v1/datasets/39",
"identifier": 39,
"type": "DataSet",
"name": "DownForce Technologies Limited - Soil Organic Carbon Stock in percentages for selected areas of Kenya",
"abstract": "Taking part to the World Bank Data4SoilHealth Challenge 2025 for Kenya, Downforce Technologies Limited has shared two raster layers containing data on Organic Carbon Content in percentages for a selected of Kenya in 2022 and 2023, with a total volume of 160.000 pixels. The model has been trained using historical measurements of occ (Organic Carbon Content) across the property from 2017 to the present. Soil moisture has been observed annually. The potential for additional occ storage has been estimated based on levels observed in similar surrounding lands. Variability in occ across the property has been assessed based on its performance over time. The ongoing occ trend has been evaluated in comparison to the baseline.",
"datePublished": "2024-??-??",
"temporalCoverage": "2022/2023",
"version": "-",
"author": { "type": "Organization", "name": "DownForce Technologies Limited", "url": "https://www.downforce.tech/" },
"publisher": { "type": "Organization", "name": "DownForce Technologies Limited", "url": "https://www.downforce.tech/" },
"status": { "description": "Dataset status in the system", "value": "ingested" },
"spatialCoverage": { "name": "global", "spatialResolution": "10 m (10 x 10 m pixel)" },
"variableMeasured": [
{ "type": "PropertyValue", "identifier": 15, "name": "occ_0-30cm_10_2022", "description": "Organic Carbon Content in percentage at 10m resolution", "unitText": "%", "unitCode": "https://qudt.org/vocab/unit/PERCENT" },
{ "type": "PropertyValue", "identifier": 15, "name": "occ_0-30cm_10_2023", "description": "Organic Carbon Content in percentage at 10m resolution", "unitText": "%", "unitCode": "https://qudt.org/vocab/unit/PERCENT" }
],
"measurementTechnique": { "type": "DefinedTerm", "name": "D2.8.III.3 INSPIRE Data Specification on Soil, soil profile category", "termCode": "DerivedSoilProfile", "url": "https://inspire.ec.europa.eu/featureconcept/DerivedSoilProfile" },
"gisDataType": { "description": "GIS data type describes the original format. It can be either point, polygonal, raster", "value": "raster" },
"distribution": { "type": "DataDownload", "encodingFormat": "TIF", "lockedForDownload": false },
"size": { "type": "QuantitativeValue", "value": "2", "unitCode": "files" },
"license": "Data4SoilHealth Challenge Data Use Agreement",
"citation": "DownForce Technologies Limited, \"Soil Organic Carbon in percentages for selected areas of Kenya in 2022\"; \"Soil Organic Carbon in percentages for selected areas of Kenya in 2023\" (2024), SoilHive. Retrieved from https://app.soilhive.ag/availability",
"parentProject": { "type": "Project", "id": "01945066-074b-7214-a44d-2ee2193a0959", "name": "Kenya hackathon", "description": "Kenya hackathon project", "memberOf": { "type": "Organization", "name": "Varda Foundation" } }
},
{
"@id": "https://api.soilhive.ag/v1/datasets/4",
"identifier": 4,
"type": "DataSet",
"name": "Harmonized World Soil Database",
"abstract": "The Harmonized World Soil Database version 2.0 (HWSD v2.0) is a unique global soil inventory providing information on the morphological, chemical and physical properties of soils at approximately 1 km resolution. Its main objective is to be useful for modelers and to serve as a basis for prospective studies on agroecological zoning, food security and the impacts of climate change. HWSD v2.0 also serves an educational function, illustrating the geographical distribution of soils as well as their properties globally.",
"url": "https://gaez.fao.org/pages/hwsd",
"datePublished": "2023-??-??",
"temporalCoverage": "1995/2019",
"version": "2.0",
"author": { "type": "Organization", "name": "FAO - Food and Agriculture Organization of the United Nations; IIASA - International Institute for Applied System Analysis", "url": "https://www.fao.org/home/en" },
"publisher": { "type": "Organization", "name": "FAO - Food and Agriculture Organization of the United Nations; IIASA - International Institute for Applied System Analysis", "url": "https://www.fao.org/home/en" },
"status": { "description": "Dataset status in the system", "value": "ingested" },
"spatialCoverage": { "name": "global", "spatialResolution": "30 arc-second (1 km approximately)" },
"variableMeasured": [
{
"type": "PropertyValue",
"name": "AWC",
"description": "The maximum amount of water that the soil can hold that is available for plant growth. It is the difference between the amount of water in the soil at field capacity and the amount of water in the soil at wilting point. It is also referred to as Available Water Capacity (AWC). AWC depends on physical and chemical characteristics, but above all on effective depth or volume of the soil (FAO, 1995). The presence of a root-restricting layer reduces the water holding capacity, therefore the AWC is calculated until the rootable depth of a soil.",
"unitText": "mm",
"unitCode": "mm"
},
{
"type": "PropertyValue",
"identifier": 14,
"name": "COARSE",
"description": "A coarse fragment is any primary soil particle with a nominal diametre greater than 2 mm. The data are directly available from the WISE30sec database.",
"unitText": "%v ",
"unitCode": "%v "
},
{
"type": "PropertyValue",
"identifier": 12,
"name": "SAND",
"description": "Sand comprises particles, or granules, ranging in diametre from 0.050 to 2 mm. An individual particle in this range size is termed a sand grain. Sand feels gritty when rubbed between the fingers (silt, by comparison, feels like flour). Sand is commonly divided into five sub-categories based on size: very fine sand (1/16–1/8 mm diametre), fine sand (1/8–1/4 mm), medium sand (1/4–1/2 mm), coarse sand (1/2–1 mm), and very coarse sand (1–2 mm). The data are directly available from the WISE30sec database.",
"unitText": "%w",
"unitCode": "https://qudt.org/vocab/unit/PERCENT"
},
{
"type": "PropertyValue",
"identifier": 11,
"name": "SILT",
"description": "Silt is produced by the mechanical weathering of rock, as opposed to the chemical weathering that results in clays. This mechanical weathering can be due to grinding by glaciers, eolian abrasion (sandblasting by the wind) as well as water erosion of rocks on the beds of rivers and streams. Silt is sometimes known as “rock flour” or “stone dust”, especially when produced by glacial action. Mineralogically, silt is composed mainly of quartz and feldspar. Silt size is between 0.002 and 0.050 mm (USDA classification). The data are directly available from the WISE30sec database.",
"unitText": "%w",
"unitCode": "https://qudt.org/vocab/unit/PERCENT"
},
{
"type": "PropertyValue",
"identifier": 10,
"name": "CLAY",
"description": "Clay is naturally occurring firm earthy material, composed primarily of fine-grained (diametre less than 0.002 mm) that is plastic when wet and hardens when heated and that consists primarily of hydrated silicates or aluminum. Clay is mostly composed of clay minerals which are phyllo-silicate minerals and minerals which impart plasticity and harden when fired or dried. The definition of \"fine grained\" used above is particles smaller than 2 μm, colloid chemists (and Eastern European soil scientists) may use 1 μm. In the database no difference is made between the two, but reported figures are used, whatever the source; these values are also used to determine the “USDA texture class” as given below. The data are directly available from the WISE30sec database.",
"unitText": "%w ",
"unitCode": "%w "
},
{
"type": "PropertyValue",
"identifier": 35,
"name": "TEXTURE_USDA",
"description": "USDA texture class name and code. Soil texture is a soil property used to describe the relative proportion of different grain sizes of mineral particles in a soil. Particles are grouped according to their size into what are called soil separates (clay, silt, and sand). The soil texture class (e.g. sand, clay, loam, etc.) corresponds to a particular range of separate fractions, and is diagrammatically represented by the soil texture triangle."
},
{
"type": "PropertyValue",
"identifier": 13,
"name": "BULK",
"description": "Bulk density is defined as “the mass of the many particles of the material divided by the total volume they occupy”. Data are directly available in the WISE30sec database.",
"unitText": "g/cm3",
"unitCode": "https://qudt.org/vocab/unit/GM-PER-CentiM3"
},
{
"type": "PropertyValue",
"identifier": 13,
"name": "REF_BULK",
"description": "Reference bulk density is a property of particulate materials. It is the mass of many particles of the material divided by the volume they occupy. The volume includes the space between the particles as well as the space in the pores of individual particles.",
"unitText": "g/cm3",
"unitCode": "https://qudt.org/vocab/unit/GM-PER-CentiM3"
},
{
"type": "PropertyValue",
"identifier": 15,
"name": "ORG_CARBON",
"description": "Organic Carbon is together with pH, the best simple indicator of the health status of the soil. Moderate to high amounts of organic carbon are associated with fertile soils with a good structure. Data are directly derived from WISE30sec.",
"unitText": "%w",
"unitCode": "https://qudt.org/vocab/unit/PERCENT"
},
{
"type": "PropertyValue",
"identifier": 1,
"name": "PH_WATER",
"description": "This field gives the soil reaction. The pH, measured in a soil-water solution, is a measure for the acidity and alkalinity of the soil. Data are directly derived from WISE30sec."
},
{
"type": "PropertyValue",
"identifier": 3,
"name": "TOTAL_N",
"description": "Soil total nitrogen is a major determinant and indicator of soil fertility and quality in an agricultural ecosystem. Data are directly derived from WISE30sec",
"unitText": "g/kg",
"unitCode": "https://qudt.org/vocab/unit/GM-PER-KiloGM"
},
{
"type": "PropertyValue",
"identifier": 43,
"name": "CN_RATIO",
"description": "A carbon-to-nitrogen ratio is a ratio of the mass of carbon to the mass of nitrogen in soil material. The C:N ratio is a key indicator as it describes a balance between energetic foods (represented by carbon) and material to build protein with (represented by nitrogen). An optimal C:N ratio of around 24:1 provides for higher microbial activity (USDA, 2011). Data are directly derived from WISE30sec. Note that C/N ratios have been calculated as is from the measured data (CNrt), not as the ratio of the derived values for C and N, ditto for CECclay, as this would introduce additional errors."
},
{
"type": "PropertyValue",
"identifier": 9,
"name": "CEC_SOIL",
"description": "of the fine earth fraction (cmolc/kg). The total nutrient fixing capacity of a soil is well expressed by its Cation Exchange Capacity. Soils with low CEC have little resilience and cannot build up stores of nutrients. Many sandy soils have CEC less than 4 cmolc/kg. The clay content, the clay type and the organic matter content all determine the total nutrient storage capacity. Values more than 10 cmolc/kg are considered satisfactory for most crops. Data are derived directly from the WISE30sec database.",
"unitText": "cmolc/kg",
"unitCode": "cmolc/kg"
},
{
"type": "PropertyValue",
"identifier": 9,
"name": "CEC_CLAY",
"description": "corrected for contribution of organic matter (cmolc/kg). This field gives the cation exchange capacity of the clay fraction corrected for the organic matter content in the layer concerned. The type of clay mineral dominantly present in the soil often characterizes a specific set of pedogenetic factors in which the soil has developed. Tropical, leaching climates produce the clay mineral kaolinite, while confined conditions rich in Ca and Mg in climates with a pronounced dry season encourage the formation of the clay mineral smectite (montmorillonite). CECclay is calculated from CECsoil by assuming a mean contribution of 350 cmolc/kg OC, the common range being from 150 to over 750 cmolc/kg (Klamt and Sombroek, 1988). Data are directly derived from the WISE30sec database.",
"unitText": "cmolc/kg",
"unitCode": "cmolc/kg"
},
{
"type": "PropertyValue",
"identifier": 9,
"name": "CEC_EFF",
"description": "ECEC is defined as the sum of exchangeable (Ca++, Mg++, K+, Na+) plus the sum of exchangeable (H+, Al+++) (Van Reeuwijk, 2002). Data are derived directly from the WISE30sec database.",
"unitText": "cmolc/kg",
"unitCode": "cmolc/kg"
},
{
"type": "PropertyValue",
"identifier": 24,
"name": "TEB",
"description": "Total exchangeable bases stand for the sum of exchangeable cations in a soil: sodium (Na+), calcium (Ca++), magnesium (Mg++) and Potassium (K+). Data are directly derived from the WISE30sec database.",
"unitText": "cmolc/kg",
"unitCode": "cmolc/kg"
},
{
"type": "PropertyValue",
"identifier": 42,
"name": "BSAT",
"description": "The base saturation measures the sum of exchangeable cations (nutrients) Na+, Ca++, Mg++ and K+ as a percentage of the overall exchange capacity of the soil (including the same cations plus H+ and Al+++). The value often shows a near linear correlation with pH. Data are derived directly from the WISE30sec database. ( % of CECsoil)",
"unitText": "% ",
"unitCode": "% "
},
{
"type": "PropertyValue",
"identifier": 6,
"name": "ALUM_SAT",
"description": "The exchangeable aluminum percentage (ALSA) has been set at zero when pHwater is higher than 5.5. Data are derived directly from the WISE30sec database. (% of ECEC)",
"unitText": "% ",
"unitCode": "% "
},
{
"type": "PropertyValue",
"identifier": 28,
"name": "ESP",
"description": "The exchangeable sodium percentage has been used to indicate levels of sodium in soils. It is calculated as the ratio of Na in the CEC (or sum of cations) ESP= Na*100/CECsoil. Data are derived directly from the WISE30sec database.",
"unitText": "%",
"unitCode": "https://qudt.org/vocab/unit/PERCENT"
},
{
"type": "PropertyValue",
"identifier": 8,
"name": "TCARBON_EQ",
"description": "calcium carbonate is a chemical compound (a salt), with the chemical formula CaCO3. It is a common substance found as rock in all parts of the world. Calcium carbonate is quite common in soils particularly in drier areas and it may occur in different forms as mycelium-like threads, as soft powdery lime, as harder concretions or cemented in petrocalcic horizons. Low levels of calcium carbonate enhance soil structure and are generally beneficial for crop production but at higher concentrations they may induce iron deficiency and when cemented limit the water storage capacity of soils. Data are derived directly from the WISE30sec database.",
"unitText": "%w",
"unitCode": "https://qudt.org/vocab/unit/PERCENT"
},
{
"type": "PropertyValue",
"identifier": 44,
"name": "GYPSUM",
"description": "Gypsum is a chemical compound (a salt) which occurs occasionally in soils particularly in the driest areas of the globe where it can occur in a flower-like form typically opaque with embedded sand grains called desert rose. In soils it may occur in fibers, crystals or soft. Data are derived directly from the WISE30sec database.",
"unitText": "%w",
"unitCode": "https://qudt.org/vocab/unit/PERCENT"
},
{
"type": "PropertyValue",
"identifier": 2,
"name": "ELEC_COND",
"description": "Coastal and desert soils can be enriched with water-soluble salts or salts more soluble than gypsum. The salt content of a soil can be roughly estimated from the Electrical Conductivity of the soil measured in a saturated soil paste or a more diluted suspension of soil in water. Data are directly derived from the WISE30sec database.",
"unitText": "dS/m",
"unitCode": "https://qudt.org/vocab/unit/DeciS-PER-M"
}
],
"measurementTechnique": { "type": "DefinedTerm", "name": "D2.8.III.3 INSPIRE Data Specification on Soil, soil profile category", "termCode": "ObservedSoilProfile", "url": "https://inspire.ec.europa.eu/featureconcept/ObservedSoilProfile" },
"gisDataType": { "description": "GIS data type describes the original format. It can be either point, polygonal, raster", "value": "polygonal" },
"distribution": { "type": "DataDownload", "encodingFormat": "TIF", "lockedForDownload": true },
"license": { "type": "CreativeWork", "name": "CC BY-NC-SA 3.0 IGO", "url": "https://creativecommons.org/licenses/by-nc-sa/3.0/igo/" },
"citation": "FAO & IIASA. 2023. Harmonized World Soil Database version 2.0. Rome and Laxenburg. https://doi.org/10.4060/cc3823en",
"parentProject": null
},
{
"@id": "https://api.soilhive.ag/v1/datasets/12",
"identifier": 12,
"type": "DataSet",
"name": "iSDA Africa Field Data",
"abstract": "iSDA is an IT consulting service aiming to help smallholder farmers across Africa increase their productivity using advanced technologies while also improvIng their profitability and the well-being of their communities.<br/><br/>Founded by three research institutes - Rothamsted Research, the World Agroforestry Centre (ICRAF) and the International Institute of Tropical Agriculture (IITA) - iSDA is a mission-driven company carries forward the legacy of the African Soils Information Service (AfSIS).<br/><br/>ISDA has released a large dataset of analysed soil samples covering the African continent. These data are analysis-ready and do not require any preprocessing before usage. The dataset was collected and analysed according to protocols created by the African Soil Information Service (AfSIS) project (Vågen T-G et al., 2010). AfSIS was an initiative funded by the Bill and Melinda Gates Foundation, aimed at improving soil information across Africa. Data were collected and analysed between 2008 and 2020. In total, over 50,000 soil samples were collected across more than 15 countries.",
"url": "https://github.com/iSDA-Africa/open-soil-data",
"datePublished": "2023-??-??",
"temporalCoverage": "2008/2018",
"version": "v.1",
"author": { "type": "Organization", "name": "iSDA", "url": "https://www.isda-africa.com/" },
"publisher": { "type": "Organization", "name": "iSDA", "url": "https://www.isda-africa.com/" },
"status": { "description": "Dataset status in the system", "value": "ingested" },
"spatialCoverage": { "name": "global", "spatialResolution": "-" },
"variableMeasured": [
{ "type": "PropertyValue", "identifier": 6, "name": "aluminium_extractable", "description": "Aluminum, Mehlich3 extraction", "unitText": "mg/kg", "unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM" },
{ "type": "PropertyValue", "identifier": 19, "name": "boron_extractable", "description": "Boron, Mehlich3 extraction", "unitText": "mg/kg", "unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM" },
{ "type": "PropertyValue", "identifier": 30, "name": "calcium_extractable", "description": "Calcium, Mehlich3 extraction", "unitText": "mg/kg", "unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM" },
{ "type": "PropertyValue", "identifier": 15, "name": "carbon_organic", "description": "Organic Carbon by combustion after acidification", "unitText": "g/kg", "unitCode": "https://qudt.org/vocab/unit/GM-PER-KiloGM" },
{ "type": "PropertyValue", "identifier": 18, "name": "carbon_total", "description": "Total Carbon by combustion", "unitText": "g/kg", "unitCode": "https://qudt.org/vocab/unit/GM-PER-KiloGM" },
{ "type": "PropertyValue", "identifier": 20, "name": "copper_extractable", "description": "Copper, Mehlich3 extraction", "unitText": "mg/kg", "unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM" },
{ "type": "PropertyValue", "identifier": 2, "name": "electrical_conductivity", "description": "Electrical conductivity, Saturation Extract", "unitText": "dS/m", "unitCode": "https://qudt.org/vocab/unit/DeciS-PER-M" },
{ "type": "PropertyValue", "identifier": 7, "name": "iron_extractable", "description": "Iron, Mehlich3 extraction", "unitText": "mg/kg", "unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM" },
{ "type": "PropertyValue", "identifier": 31, "name": "magnesium_extractable", "description": "Magnesium, Mehlich3 extraction", "unitText": "mg/kg", "unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM" },
{ "type": "PropertyValue", "identifier": 21, "name": "manganese_extractable", "description": "Manganese, Mehlich3 extraction", "unitText": "mg/kg", "unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM" },
{ "type": "PropertyValue", "identifier": 3, "name": "nitrogen_total", "description": "Total Nitrogen by combustion", "unitText": "g/kg", "unitCode": "https://qudt.org/vocab/unit/GM-PER-KiloGM" },
{ "type": "PropertyValue", "identifier": 1, "name": "ph_h20", "description": "pH, measured in 1:1 soil-water suspension" },
{ "type": "PropertyValue", "identifier": 4, "name": "phosphorus_extractable", "description": "Phosphorus, Mehlich3 extraction", "unitText": "mg/kg", "unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM" },
{ "type": "PropertyValue", "identifier": 5, "name": "potassium_etractable", "description": "Potassium, Mehlich3 extraction", "unitText": "mg/kg", "unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM" },
{ "type": "PropertyValue", "identifier": 28, "name": "sodium_extractable", "description": "Sodium, Mehlich3 extraction", "unitText": "mg/kg", "unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM" },
{ "type": "PropertyValue", "identifier": 22, "name": "sulphur_extractable", "description": "Sulphur, Mehlich3 extraction", "unitText": "mg/kg", "unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM" },
{ "type": "PropertyValue", "identifier": 23, "name": "zn_extractable", "description": "Zinc, Mehlich3 extraction", "unitText": "mg/kg", "unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM" }
],
"measurementTechnique": { "type": "DefinedTerm", "name": "D2.8.III.3 INSPIRE Data Specification on Soil, soil profile category", "termCode": "ObservedSoilProfile", "url": "https://inspire.ec.europa.eu/featureconcept/ObservedSoilProfile" },
"gisDataType": { "description": "GIS data type describes the original format. It can be either point, polygonal, raster", "value": "point" },
"distribution": { "type": "DataDownload", "encodingFormat": "GeoJSON", "lockedForDownload": false },
"size": { "type": "QuantitativeValue", "value": "49225", "unitCode": "data points" },
"license": { "type": "CreativeWork", "name": "CC BY 4.0", "url": "https://creativecommons.org/licenses/by/4.0/deed.en" },
"citation": "DOI: https://doi.org/10.17605/OSF.IO/A69R5",
"parentProject": null
},
{
"@id": "https://api.soilhive.ag/v1/datasets/17",
"identifier": 17,
"type": "DataSet",
"name": "iSDAsoil",
"abstract": "iSDAsoil is a soil resource created by <a href=\"https://isda-africa.com/\" target=\"_blank\">iSDA</a>, containing soil property predictions at 30m resolution for the entire African continent.<br/><br/>Maps for over 20 different soil properties have been created at three different depth ranges (0-20, 20-50 and 0-200 cm). Soil property predictions were made using machine learning coupled with remote sensing data and a training set of over 100,000 analyzed soil samples. Included in the original resource there are images of predicted soil properties, model error and satellite covariates used in the mapping process.<br/><br/>To explore the iSDAsoil data, it is recommended to visit the <a href=\"https://isda-africa.com/isdasoil\" target=\"_blank\">iSDAsoil homepage</a>.<br/>Further information can be found in the <a href=\"https://www.isda-africa.com/isdasoil/faq/\" target=\"_blank\">FAQ section</a>, and <a href=\"https://www.isda-africa.com/isdasoil/technical-information/\" target=\"_blank\">technical information documentation</a>",
"url": "https://zenodo.org/search?q=iSDAsoil&l=list&p=1&s=20&sort=bestmatch",
"datePublished": "2020-??-??",
"temporalCoverage": "2001/2017",
"version": "0.13",
"author": { "type": "Organization", "name": "iSDA", "url": "https://www.isda-africa.com/" },
"publisher": { "type": "Organization", "name": "iSDA", "url": "https://www.isda-africa.com/" },
"status": { "description": "Dataset status in the system", "value": "ingested" },
"spatialCoverage": { "name": "global", "spatialResolution": "30 m (30 x 30 m pixel)" },
"variableMeasured": [
{
"type": "PropertyValue",
"identifier": 6,
"name": "Al.mehlich3",
"description": "soil extractable Aluminium (Al) log-transformed predicted at 30 m resolution for 0–20 and 20–50 cm depth intervals.",
"unitText": "ppm",
"unitCode": "https://qudt.org/vocab/unit/PPM",
"maxValue": "1,800"
},
{
"type": "PropertyValue",
"identifier": 23,
"name": "zn.mehlich3",
"description": "soil extractable Zinc (Zn) log-transformed predicted at 30 m resolution for 0–20 and 20–50 cm depth intervals.",
"unitText": "ppm",
"unitCode": "https://qudt.org/vocab/unit/PPM",
"maxValue": "125"
},
{
"type": "PropertyValue",
"identifier": 4,
"name": "p.mehlich3",
"description": "iSDAsoil dataset soil extractable Phosphorus (P) log-transformed predicted at 30 m resolution for 0–20 and 20–50 cm depth intervals.",
"unitText": "ppm",
"unitCode": "https://qudt.org/vocab/unit/PPM",
"maxValue": "125"
},
{
"type": "PropertyValue",
"identifier": 5,
"name": "k_mehlich3",
"description": "soil extractable Potassium (K) log-transformed predicted at 30 m resolution for 0–20 and 20–50 cm depth intervals.",
"unitText": "ppm",
"unitCode": "https://qudt.org/vocab/unit/PPM",
"maxValue": "1,200"
},
{
"type": "PropertyValue",
"identifier": 3,
"name": "n_tot_mehlich3",
"description": "soil total organic Nitrogen (N) log-transformed predicted at 30 m resolution for 0–20 and 20–50 cm depth intervals",
"unitText": "g/kg",
"unitCode": "https://qudt.org/vocab/unit/GM-PER-KiloGM",
"maxValue": "10"
},
{
"type": "PropertyValue",
"identifier": 22,
"name": "s_mehlich3",
"description": "soil extractable Sulphur (S) log-transformed predicted at 30 m resolution for 0–20 and 20–50 cm depth intervals",
"unitText": "ppm",
"unitCode": "https://qudt.org/vocab/unit/PPM",
"maxValue": "125"
},
{
"type": "PropertyValue",
"identifier": 10,
"name": "clay_tot_psa",
"description": "soil clay content (USDA system) in % predicted at 30 m resolution for 0–20 and 20–50 cm depth intervals",
"unitText": "%",
"unitCode": "https://qudt.org/vocab/unit/PERCENT",
"maxValue": "70"
},
{
"type": "PropertyValue",
"identifier": 7,
"name": "fe_mehlich3",
"description": "soil extractable Iron (Fe) log-transformed predicted at 30 m resolution for 0–20 and 20–50 cm depth intervals.",
"unitText": "ppm",
"unitCode": "https://qudt.org/vocab/unit/PPM",
"maxValue": "1,200"
},
{
"type": "PropertyValue",
"identifier": 30,
"name": "ca_mehlich3",
"description": "soil extractable Calcium log-transformed predicted at 30 m resolution for 0–20 and 20–50 cm depth intervals.",
"unitText": "ppm",
"unitCode": "https://qudt.org/vocab/unit/PPM",
"maxValue": "12,000"
},
{
"type": "PropertyValue",
"identifier": 31,
"name": "mg_mehlich3",
"description": "soil extractable Magnesium (Mg) log-transformed predicted at 30 m resolution for 0–20 and 20–50 cm depth intervals.",
"unitText": "ppm",
"unitCode": "https://qudt.org/vocab/unit/PPM",
"maxValue": "1,200"
},
{
"type": "PropertyValue",
"identifier": 11,
"name": "silt_tot_psa",
"description": "soil silt content in % predicted at 30 m resolution for 0–20 and 20–50 cm depth intervals.",
"unitText": "%",
"unitCode": "https://qudt.org/vocab/unit/PERCENT",
"maxValue": "70"
},
{
"type": "PropertyValue",
"identifier": 12,
"name": "sand_tot_psa",
"description": "soil sand content in % predicted at 30 m resolution for 0–20 and 20–50 cm depth intervals.",
"unitText": "%",
"unitCode": "https://qudt.org/vocab/unit/PERCENT",
"maxValue": "100"
},
{
"type": "PropertyValue",
"identifier": 9,
"name": "ecec.f",
"description": "soil effective Cation Exchange Capacity (eCEC) log-transformed predicted at 30 m resolution for 0–20 and 20–50 cm depth intervals.",
"unitText": "cmolc/kg",
"unitCode": "cmolc/kg",
"maxValue": "130"
},
{
"type": "PropertyValue",
"identifier": 18,
"name": "c_tot_mehlich3",
"description": "soil total carbon in permilles (g/kg) log-transformed predicted at 30 m resolution for 0–20 and 20–50 cm depth intervals.",
"unitText": "g/kg",
"unitCode": "https://qudt.org/vocab/unit/GM-PER-KiloGM",
"maxValue": "40"
},
{
"type": "PropertyValue",
"identifier": 15,
"name": "oc_mehlich3",
"description": "soil organic carbon (C) log-transformed predicted at 30 m resolution for 0–20 and 20–50 cm depth intervals.",
"unitText": "g/kg",
"unitCode": "https://qudt.org/vocab/unit/GM-PER-KiloGM",
"maxValue": "40"
},
{
"type": "PropertyValue",
"identifier": 13,
"name": "db_od",
"description": "soil fine-earth bulk density in 10×kg/m3 predicted at 30 m resolution for 0–20 and 20–50 cm depth intervals.",
"unitText": "10×kg/m3",
"unitCode": "10×kg/m3",
"minValue": "0.8",
"maxValue": "1.85"
},
{
"type": "PropertyValue",
"identifier": 14,
"name": "wpg2_mehlich3",
"description": "soil stone content / coarse fragments log-transformed predicted at 30 m resolution for 0–20 and 20–50 cm depth intervals.",
"unitText": "%",
"unitCode": "https://qudt.org/vocab/unit/PERCENT",
"maxValue": "80"
},
{
"type": "PropertyValue",
"identifier": 1,
"name": "ph_h2o",
"description": "soil pH (1:1 Soil-Water Suspension) predicted at 30 m resolution for 0–20 and 20–50 cm depth intervals.",
"unitText": "pHx10",
"unitCode": "pHx10",
"maxValue": "10.50"
},
{
"type": "PropertyValue",
"identifier": 35,
"name": "sol_texture.class_m_30m_0..20cm_2001..2017_v0.13_wgs84",
"description": "Textural Class for 0-20 cm depth interval, expressed as 1 = Clay, 2 = Silty Clay, 3 = Sandy Clay, 4 = Clay Loam, 5 = Silty Clay Loam, 6 = Sandy Clay Loam, 7 = Loam, 8 = Silty Loam, 9 = Sandy Loam, 10 = Silt, 11 = Loamy Sand, 12 = Sand"
},
{
"type": "PropertyValue",
"identifier": 35,
"name": "sol_texture.class_m_30m_20..50cm_2001..2017_v0.13_wgs84",
"description": "Textural Class for 20-50 cm depth interval, expressed as 1 = Clay, 2 = Silty Clay, 3 = Sandy Clay, 4 = Clay Loam, 5 = Silty Clay Loam, 6 = Sandy Clay Loam, 7 = Loam, 8 = Silty Loam, 9 = Sandy Loam, 10 = Silt, 11 = Loamy Sand, 12 = Sand"
},
{ "type": "PropertyValue", "identifier": 62, "name": "sol_bdr_m_30m_0..200cm_2001..2017_v0.13_wgs84", "description": "Depth to bedrock, predicted mean at 0-200 cm depth", "unitText": "cm", "unitCode": "https://qudt.org/vocab/unit/CentiM" }
],
"measurementTechnique": { "type": "DefinedTerm", "name": "D2.8.III.3 INSPIRE Data Specification on Soil, soil profile category", "termCode": "DerivedSoilProfile", "url": "https://inspire.ec.europa.eu/featureconcept/DerivedSoilProfile" },
"gisDataType": { "description": "GIS data type describes the original format. It can be either point, polygonal, raster", "value": "raster" },
"distribution": { "type": "DataDownload", "encodingFormat": "TIF", "lockedForDownload": false },
"size": { "type": "QuantitativeValue", "value": "37", "unitCode": "files" },
"license": { "type": "CreativeWork", "name": "CC BY 4.0", "url": "https://creativecommons.org/licenses/by/4.0/deed.en" },
"citation": "Hengl, T., Miller, M.A.E., Križan, J. et al. African soil properties and nutrients mapped at 30 m spatial resolution using two-scale ensemble machine learning. Sci Rep 11, 6130 (2021). https://doi.org/10.1038/s41598-021-85639-y",
"parentProject": null
},
{
"@id": "https://api.soilhive.ag/v1/datasets/28",
"identifier": 28,
"type": "DataSet",
"name": "Biophysical baseline assessment within the KCEP-CRAL action areas in Kenya, using the LDSF",
"abstract": "These data were collected within the Kenya Cereal Enhancement Programme-Climate Resilient Agricultural Livelihoods (KCEP-CRAL) Window. This study was conducted within the action sites of the Kenya Cereal Enhancement Programme-Climate Resilient Agricultural Livelihoods (KCEP-CRAL) Window, which is a programme supported by the Government of Kenya and International Fund for Agricultural Development (IFAD) within the Adaptation for Smallholder Agriculture Programme (ASAP). The project assessed key indicators of land and soil health in order to understand drivers of degradation, and monitor changes over time using the <a href=\"http://landscapeportal.org/blog/2015/03/25/the-land-degradation-surveillance-framework-ldsf/\" target=\"_blank\">Land Degradation Surveillance Framework (LDSF) methodology</a>. The LDSF provides a field protocol for measuring indicators of the \"health\" of an ecosystem. The LDSF was developed by the World Agroforestry (ICRAF) in response to the need for consistent field methods and indicator frameworks to assess land health in landscapes. The framework has been applied in projects across the global tropics, and is currently one of the largest land health databases globally with more than 30,000 observations, shared at http://landscapeportal.org. This project will benefit from existing data in the LDSF database, while at the same time contributing to these critically important global datasets through on-going data collection. Earth Observation (EO) data will be combined with the LDSF framework to develop the outputs for the project, including land degradation and soil health. Specific Activities on the ICRAF Component as Stated in the Agreement 1. Develop survey methodology detailing study design, methodology, tools, work plan and timelines documented 2. Procure LDSF field survey equipment 3. Conduct five LDSF surveys across the KCEP-CRAL action areas 4. Process, analyse and document the soil samples 5. Conduct Earth Observation-based assessment of biophysical indicators over time 6. Conduct capacity development opportunities with members of the PCU M&E staff and Government counterparts on LDSF field methodology This dataset contains LDSF field data from five LDSF sites in Kenya totalling 787 LDSF plots . It also contains the predictions using MIR Spectroscopy for 1500 Topsoil (0-20cm) and Subsoil (20-50cm) samples for six soil variables, including soil organic carbon, total nitrogen and pH. Related publications: <a href=\"https://www.sciencedirect.com/science/article/pii/S0048969723066652?via%3Dihub\" target=\"_blank\">Drivers of field-saturated soil hydraulic conductivity: Implications for restoring degraded tropical landscapes</a> ; <a href=\"https://stud.epsilon.slu.se/16632/\" target=\"_blank\">Drivers of topsoil saturated hydraulic conductivity in three contrasting landscapes in Kenya.</a>",
"url": "https://data.worldagroforestry.org/dataset.xhtml?persistentId=doi:10.34725/DVN/CBHCKS",
"datePublished": "2021-03-30",
"temporalCoverage": "2018/2019",
"version": "v4",
"author": { "type": "Organization", "name": "Winowiecki, Leigh Ann (ICRAF), Vågen, Tor-Gunnar (ICRAF), Tobella-Bargues, Aida (SLU), Magaju, Christine (ICRAF), Muriuki, Justin (GoK), Mwaniki, Alex (GoK)" },
"publisher": { "type": "Organization", "name": "Winowiecki, Leigh Ann (ICRAF), Vågen, Tor-Gunnar (ICRAF), Tobella-Bargues, Aida (SLU), Magaju, Christine (ICRAF), Muriuki, Justin (GoK), Mwaniki, Alex (GoK)" },
"status": { "description": "Dataset status in the system", "value": "ingested" },
"spatialCoverage": { "name": "global", "spatialResolution": "-" },
"variableMeasured": [
{ "type": "PropertyValue", "identifier": 15, "name": "predSOC", "description": "Predicted Soil Organic Carbon (SOC) content", "unitText": "g/kg", "unitCode": "https://qudt.org/vocab/unit/GM-PER-KiloGM" },
{ "type": "PropertyValue", "identifier": 3, "name": "predTN", "description": "Predicted Total Nitrogen content", "unitText": "%", "unitCode": "https://qudt.org/vocab/unit/PERCENT" },
{ "type": "PropertyValue", "identifier": 1, "name": "predpH", "description": "Predicted Soil pH in water (soil: water ratio of 1:2 weight to volume basis)" },
{ "type": "PropertyValue", "identifier": 24, "name": "predExBas", "description": "Predicted Exchangeable bases (sum of Mehlich-3 Ca, Mg, K, Na)", "unitText": "cmolc/kg", "unitCode": "cmolc/kg" },
{ "type": "PropertyValue", "identifier": 12, "name": "predSand", "description": "Predicted Sand content of calgon dispersed particles after 4 minutes of ultrasonication", "unitText": "%", "unitCode": "https://qudt.org/vocab/unit/PERCENT" },
{ "type": "PropertyValue", "identifier": 10, "name": "predClay", "description": "Predicted Clay content of calgon dispersed particles after 4 minutes of ultrasonication", "unitText": "%", "unitCode": "https://qudt.org/vocab/unit/PERCENT" }
],
"measurementTechnique": { "type": "DefinedTerm", "name": "D2.8.III.3 INSPIRE Data Specification on Soil, soil profile category", "termCode": "ObservedSoilProfile", "url": "https://inspire.ec.europa.eu/featureconcept/ObservedSoilProfile" },
"gisDataType": { "description": "GIS data type describes the original format. It can be either point, polygonal, raster", "value": "point" },
"distribution": { "type": "DataDownload", "encodingFormat": "GeoJSON", "lockedForDownload": false },
"size": { "type": "QuantitativeValue", "value": "773", "unitCode": "data points" },
"license": { "type": "CreativeWork", "name": "CC BY 4.0", "url": "https://creativecommons.org/licenses/by/4.0/deed.en" },
"citation": "Winowiecki, Leigh Ann; Vågen, Tor-Gunnar; Tobella-Bargues, Aida; Magaju, Christine; Muriuki, Justin; Mwaniki, Alex, 2021, \"Biophysical baseline assessment within the KCEP-CRAL action areas in Kenya, using the LDSF\", https://doi.org/10.34725/DVN/CBHCKS, World Agroforestry (ICRAF), V4",
"parentProject": null
},
{
"@id": "https://api.soilhive.ag/v1/datasets/19",
"identifier": 19,
"type": "DataSet",
"name": "SoilGrids — global gridded soil information",
"abstract": "SoilGrids is designed as a globally consistent, data-driven system that predicts soil properties and classes using global covariates and globally fitted models. If you are looking for soil information on national and/or local levels we advise you, before using SoilGrids, to compare SoilGrids predictions with soil maps derived from national and local soil geographical databases. National soil maps are usually based on more detailed input soil information and therefore are often more accurate than SoilGrids (within the local coverage area). For an overview of national and regional soil databases, please refer to the Soil Geographic Databases compendium.<br/><br/>The selection of soil profiles underpinning SoilGrids is larger than the publicly available set ('wosis_latest') displayed here (for details see the ESSD paper). The actual number of observations for each property varies (greatly) between profiles and with depth, generally depending on the objectives of the initial soil sampling programmes. National soil survey organisations will generally maintain a wider selection of soil profiles/properties for their country in their databases.",
"url": "https://soilgrids.org/",
"datePublished": "2021-05-11",
"temporalCoverage": "1905/2016",
"version": "2.0",
"author": { "type": "Organization", "name": "ISRIC - World Soil Information", "url": "https://www.isric.org/" },
"publisher": { "type": "Organization", "name": "ISRIC - World Soil Information", "url": "https://www.isric.org/" },
"status": { "description": "Dataset status in the system", "value": "ingested" },
"spatialCoverage": { "name": "global", "spatialResolution": "250 m (250 x 250 m pixel)" },
"variableMeasured": [
{ "type": "PropertyValue", "identifier": 13, "name": "bdod_0-5cm_mean_250", "description": "Bulk density of the fine earth fraction(0-5)", "unitText": "cg/cm3", "unitCode": "cg/cm3" },
{ "type": "PropertyValue", "identifier": 13, "name": "bdod_5-15cm_mean_250", "description": "Bulk density of the fine earth fraction(5-15)", "unitText": "cg/cm3", "unitCode": "cg/cm3" },
{ "type": "PropertyValue", "identifier": 13, "name": "bdod_15-30cm_mean_250", "description": "Bulk density of the fine earth fraction(15-30)", "unitText": "cg/cm3", "unitCode": "cg/cm3" },
{ "type": "PropertyValue", "identifier": 13, "name": "bdod_30-60cm_mean_250", "description": "Bulk density of the fine earth fraction(30-60)", "unitText": "cg/cm3", "unitCode": "cg/cm3" },
{ "type": "PropertyValue", "identifier": 13, "name": "bdod_60-100cm_mean_250", "description": "Bulk density of the fine earth fraction(60-100)", "unitText": "cg/cm3", "unitCode": "cg/cm3" },
{ "type": "PropertyValue", "identifier": 13, "name": "bdod_100-200cm_mean_250", "description": "Bulk density of the fine earth fraction(100-200)", "unitText": "cg/cm3", "unitCode": "cg/cm3" },
{ "type": "PropertyValue", "identifier": 9, "name": "cec_0-5cm_mean_250", "description": "Cation Exchange Capacity of the soil (0-5)", "unitText": "mmolc/kg", "unitCode": "mmolc/kg" },
{ "type": "PropertyValue", "identifier": 9, "name": "cec_5-15cm_mean_250", "description": "Cation Exchange Capacity of the soil(5-15)", "unitText": "mmolc/kg", "unitCode": "mmolc/kg" },
{ "type": "PropertyValue", "identifier": 9, "name": "cec_15-30cm_mean_250", "description": "Cation Exchange Capacity of the soi(15-30)l", "unitText": "mmolc/kg", "unitCode": "mmolc/kg" },
{ "type": "PropertyValue", "identifier": 9, "name": "cec_30-60cm_mean_250", "description": "Cation Exchange Capacity of the soil(30-60)", "unitText": "mmolc/kg", "unitCode": "mmolc/kg" },
{ "type": "PropertyValue", "identifier": 9, "name": "cec_60-100cm_mean_250", "description": "Cation Exchange Capacity of the soil(60-100)", "unitText": "mmolc/kg", "unitCode": "mmolc/kg" },
{ "type": "PropertyValue", "identifier": 9, "name": "cec_100-200cm_mean_250", "description": "Cation Exchange Capacity of the soil(100-200)", "unitText": "mmolc/kg", "unitCode": "mmolc/kg" },
{ "type": "PropertyValue", "identifier": 14, "name": "cfvo_0-5cm_mean_250", "description": "Volumetric fraction of coarse fragments (> 2 mm) (0-5)", "unitText": "cm3/dm3", "unitCode": "cm3/dm3" },
{ "type": "PropertyValue", "identifier": 14, "name": "cfvo_5-15cm_mean_250", "description": "Volumetric fraction of coarse fragments (> 2 mm) (5-15)", "unitText": "cm3/dm3", "unitCode": "cm3/dm3" },
{ "type": "PropertyValue", "identifier": 14, "name": "cfvo_15-30cm_mean_250", "description": "Volumetric fraction of coarse fragments (> 2 mm) (15-30)", "unitText": "cm3/dm3", "unitCode": "cm3/dm3" },
{ "type": "PropertyValue", "identifier": 14, "name": "cfvo_30-60cm_mean_250", "description": "Volumetric fraction of coarse fragments (> 2 mm) (30-60)", "unitText": "cm3/dm3", "unitCode": "cm3/dm3" },
{ "type": "PropertyValue", "identifier": 14, "name": "cfvo_60-100cm_mean_250", "description": "Volumetric fraction of coarse fragments (> 2 mm)(60-100)", "unitText": "cm3/dm3", "unitCode": "cm3/dm3" },
{ "type": "PropertyValue", "identifier": 14, "name": "cfvo_100-200cm_mean_250", "description": "Volumetric fraction of coarse fragments (> 2 mm) (100-200)", "unitText": "cm3/dm3", "unitCode": "cm3/dm3" },
{ "type": "PropertyValue", "identifier": 3, "name": "nitrogen_0-5cm_mean_250", "description": "Total nitrogen (N) (0-5)", "unitText": "cg/kg", "unitCode": "cg/kg" },
{ "type": "PropertyValue", "identifier": 3, "name": "nitrogen_5-15cm_mean_250", "description": "Total nitrogen (N) (5-15)", "unitText": "cg/kg", "unitCode": "cg/kg" },
{ "type": "PropertyValue", "identifier": 3, "name": "nitrogen_15-30cm_mean_250", "description": "Total nitrogen (N) (15-30)", "unitText": "cg/kg", "unitCode": "cg/kg" },
{ "type": "PropertyValue", "identifier": 3, "name": "nitrogen_30-60cm_mean_250", "description": "Total nitrogen (N) (30-60)", "unitText": "cg/kg", "unitCode": "cg/kg" },
{ "type": "PropertyValue", "identifier": 3, "name": "nitrogen_60-100cm_mean_250", "description": "Total nitrogen (N) (60-100)", "unitText": "cg/kg", "unitCode": "cg/kg" },
{ "type": "PropertyValue", "identifier": 3, "name": "nitrogen_100-200cm_mean_250", "description": "Total nitrogen (N) (100-200)", "unitText": "cg/kg", "unitCode": "cg/kg" },
{ "type": "PropertyValue", "identifier": 1, "name": "phh2o_0-5cm_mean_250", "description": "Soil pH(0-5)", "unitText": "pHx10", "unitCode": "pHx10" },
{ "type": "PropertyValue", "identifier": 1, "name": "phh2o_5-15cm_mean_250", "description": "Soil pH(5-15)", "unitText": "pHx10", "unitCode": "pHx10" },
{ "type": "PropertyValue", "identifier": 1, "name": "phh2o_15-30cm_mean_250", "description": "Soil pH(15-30)", "unitText": "pHx10", "unitCode": "pHx10" },
{ "type": "PropertyValue", "identifier": 1, "name": "phh2o_30-60cm_mean_250", "description": "Soil pH(30-60)", "unitText": "pHx10", "unitCode": "pHx10" },
{ "type": "PropertyValue", "identifier": 1, "name": "phh2o_60-100cm_mean_250", "description": "Soil pH60-(100)", "unitText": "pHx10", "unitCode": "pHx10" },
{ "type": "PropertyValue", "identifier": 1, "name": "phh2o_100-200cm_mean_250", "description": "Soil pH(100-200)", "unitText": "pHx10", "unitCode": "pHx10" },
{
"type": "PropertyValue",
"identifier": 10,
"name": "clay_0-5cm_mean_250",
"description": "Proportion of clay particles (< 0.002 mm) in the fine earth fraction(0-5)",
"unitText": "g/kg",
"unitCode": "https://qudt.org/vocab/unit/GM-PER-KiloGM"
},
{
"type": "PropertyValue",
"identifier": 10,
"name": "clay_5-15cm_mean_250",
"description": "Proportion of clay particles (< 0.002 mm) in the fine earth fraction(5-15)",
"unitText": "g/kg",
"unitCode": "https://qudt.org/vocab/unit/GM-PER-KiloGM"
},
{
"type": "PropertyValue",
"identifier": 10,
"name": "clay_15-30cm_mean_250",
"description": "Proportion of clay particles (< 0.002 mm) in the fine earth fraction(15-30)",
"unitText": "g/kg",
"unitCode": "https://qudt.org/vocab/unit/GM-PER-KiloGM"
},
{
"type": "PropertyValue",
"identifier": 10,
"name": "clay_30-60cm_mean_250",
"description": "Proportion of clay particles (< 0.002 mm) in the fine earth fraction(30-60)",
"unitText": "g/kg",
"unitCode": "https://qudt.org/vocab/unit/GM-PER-KiloGM"
},
{
"type": "PropertyValue",
"identifier": 10,
"name": "clay_100-200cm_mean_250",
"description": "Proportion of clay particles (< 0.002 mm) in the fine earth fraction(100-200)",
"unitText": "g/kg",
"unitCode": "https://qudt.org/vocab/unit/GM-PER-KiloGM"
},
{
"type": "PropertyValue",
"identifier": 10,
"name": "clay_60-100cm_mean_250",
"description": "Proportion of clay particles (< 0.002 mm) in the fine earth fraction(60-100)",
"unitText": "g/kg",
"unitCode": "https://qudt.org/vocab/unit/GM-PER-KiloGM"
},
{
"type": "PropertyValue",
"identifier": 12,
"name": "sand_0-5cm_mean_250",
"description": "Proportion of sand particles (> 0.05 mm) in the fine earth fraction(0-5)",
"unitText": "g/kg",
"unitCode": "https://qudt.org/vocab/unit/GM-PER-KiloGM"
},
{
"type": "PropertyValue",
"identifier": 12,
"name": "sand_5-15cm_mean_250",
"description": "Proportion of sand particles (> 0.05 mm) in the fine earth fraction(5-15)",
"unitText": "g/kg",
"unitCode": "https://qudt.org/vocab/unit/GM-PER-KiloGM"
},
{
"type": "PropertyValue",
"identifier": 12,
"name": "sand_15-30cm_mean_250",
"description": "Proportion of sand particles (> 0.05 mm) in the fine earth fraction(15-30)",
"unitText": "g/kg",
"unitCode": "https://qudt.org/vocab/unit/GM-PER-KiloGM"
},
{
"type": "PropertyValue",
"identifier": 12,
"name": "sand_30-60cm_mean_250",
"description": "Proportion of sand particles (> 0.05 mm) in the fine earth fraction(30-60)",
"unitText": "g/kg",
"unitCode": "https://qudt.org/vocab/unit/GM-PER-KiloGM"
},
{
"type": "PropertyValue",
"identifier": 12,
"name": "sand_60-100cm_mean_250",
"description": "Proportion of sand particles (> 0.05 mm) in the fine earth fraction(60-100)",
"unitText": "g/kg",
"unitCode": "https://qudt.org/vocab/unit/GM-PER-KiloGM"
},
{
"type": "PropertyValue",
"identifier": 12,
"name": "sand_100-200cm_mean_250",
"description": "Proportion of sand particles (> 0.05 mm) in the fine earth fraction(100-200)",
"unitText": "g/kg",
"unitCode": "https://qudt.org/vocab/unit/GM-PER-KiloGM"
},
{
"type": "PropertyValue",
"identifier": 11,
"name": "silt_0-5cm_mean_250",
"description": "Proportion of silt particles (≥ 0.002 mm and ≤ 0.05 mm) in the fine earth fraction(0-5)",
"unitText": "g/kg",
"unitCode": "https://qudt.org/vocab/unit/GM-PER-KiloGM"
},
{
"type": "PropertyValue",
"identifier": 11,
"name": "silt_5-15cm_mean_250",
"description": "Proportion of silt particles (≥ 0.002 mm and ≤ 0.05 mm) in the fine earth fraction(5-15)",
"unitText": "g/kg",
"unitCode": "https://qudt.org/vocab/unit/GM-PER-KiloGM"
},
{
"type": "PropertyValue",
"identifier": 11,
"name": "silt_15-30cm_mean_250",
"description": "Proportion of silt particles (≥ 0.002 mm and ≤ 0.05 mm) in the fine earth fraction(15-30)",
"unitText": "g/kg",
"unitCode": "https://qudt.org/vocab/unit/GM-PER-KiloGM"
},
{
"type": "PropertyValue",
"identifier": 11,
"name": "silt_30-60cm_mean_250",
"description": "Proportion of silt particles (≥ 0.002 mm and ≤ 0.05 mm) in the fine earth fraction(30-60)",
"unitText": "g/kg",
"unitCode": "https://qudt.org/vocab/unit/GM-PER-KiloGM"
},
{
"type": "PropertyValue",
"identifier": 11,
"name": "silt_60-100cm_mean_250",
"description": "Proportion of silt particles (≥ 0.002 mm and ≤ 0.05 mm) in the fine earth fraction(60-100)",
"unitText": "g/kg",
"unitCode": "https://qudt.org/vocab/unit/GM-PER-KiloGM"
},
{
"type": "PropertyValue",
"identifier": 11,
"name": "silt_100-200cm_mean_250",
"description": "Proportion of silt particles (≥ 0.002 mm and ≤ 0.05 mm) in the fine earth fraction(100-200)",
"unitText": "g/kg",
"unitCode": "https://qudt.org/vocab/unit/GM-PER-KiloGM"
},
{ "type": "PropertyValue", "identifier": 15, "name": "soc_0-5cm_mean_250", "description": "Soil organic carbon content in the fine earth fraction()", "unitText": "dg/kg", "unitCode": "dg/kg" },
{ "type": "PropertyValue", "identifier": 15, "name": "soc_5-15cm_mean_250", "description": "Soil organic carbon content in the fine earth fraction()", "unitText": "dg/kg", "unitCode": "dg/kg" },
{ "type": "PropertyValue", "identifier": 15, "name": "soc_15-30cm_mean_250", "description": "Soil organic carbon content in the fine earth fraction()", "unitText": "dg/kg", "unitCode": "dg/kg" },
{ "type": "PropertyValue", "identifier": 15, "name": "soc_30-60cm_mean_250", "description": "Soil organic carbon content in the fine earth fraction()", "unitText": "dg/kg", "unitCode": "dg/kg" },
{ "type": "PropertyValue", "identifier": 15, "name": "soc_60-100cm_mean_250", "description": "Soil organic carbon content in the fine earth fraction()", "unitText": "dg/kg", "unitCode": "dg/kg" },
{ "type": "PropertyValue", "identifier": 15, "name": "soc_100-200cm_mean_250", "description": "Soil organic carbon content in the fine earth fraction()", "unitText": "dg/kg", "unitCode": "dg/kg" },
{ "type": "PropertyValue", "identifier": 33, "name": "ocd_0-5cm_mean_250", "description": "Organic carbon density(0-5)", "unitText": "hg/m3", "unitCode": "hg/m3" },
{ "type": "PropertyValue", "identifier": 33, "name": "ocd_5-15cm_mean_250", "description": "Organic carbon density(5-15)", "unitText": "hg/m3", "unitCode": "hg/m3" },
{ "type": "PropertyValue", "identifier": 33, "name": "ocd_15-30cm_mean_250", "description": "Organic carbon density(15-30)", "unitText": "hg/m3", "unitCode": "hg/m3" },
{ "type": "PropertyValue", "identifier": 33, "name": "ocd_30-60cm_mean_250", "description": "Organic carbon density(30-60)", "unitText": "hg/m3", "unitCode": "hg/m3" },
{ "type": "PropertyValue", "identifier": 33, "name": "ocd_60-100cm_mean_250", "description": "Organic carbon density(60-100)", "unitText": "hg/m3", "unitCode": "hg/m3" },
{ "type": "PropertyValue", "identifier": 33, "name": "ocd_100-200cm_mean_250", "description": "Organic carbon density(100-200)", "unitText": "hg/m3", "unitCode": "hg/m3" },
{ "type": "PropertyValue", "identifier": 32, "name": "ocs_0-30cm_mean_250", "description": "Organic carbon stocks(0-30)", "unitText": "t/ha", "unitCode": "https://qudt.org/vocab/unit/TONNE-PER-HA" },
{ "type": "PropertyValue", "identifier": 34, "name": "wv0010_0-5cm_mean_250", "description": "Volumetric Water Content at 10kPa in 10-3 cm3/cm3 (0.1 v% or 1 mm/m) (0-5)", "unitText": "cm3/100cm3", "unitCode": "cm3/100cm3" },
{ "type": "PropertyValue", "identifier": 34, "name": "wv0010_5-15cm_mean_250", "description": "Volumetric Water Content at 10kPa in 10-3 cm3/cm3 (0.1 v% or 1 mm/m) (5-15)", "unitText": "cm3/100cm3", "unitCode": "cm3/100cm3" },
{ "type": "PropertyValue", "identifier": 34, "name": "wv0010_15-30cm_mean_250", "description": "Volumetric Water Content at 10kPa in 10-3 cm3/cm3 (0.1 v% or 1 mm/m) (15-30)", "unitText": "cm3/100cm3", "unitCode": "cm3/100cm3" },
{ "type": "PropertyValue", "identifier": 34, "name": "wv0010_30-60cm_mean_250", "description": "Volumetric Water Content at 10kPa in 10-3 cm3/cm3 (0.1 v% or 1 mm/m) (30-60)", "unitText": "cm3/100cm3", "unitCode": "cm3/100cm3" },
{ "type": "PropertyValue", "identifier": 34, "name": "wv0010_60-100cm_mean_250", "description": "Volumetric Water Content at 10kPa in 10-3 cm3/cm3 (0.1 v% or 1 mm/m) (60-100)", "unitText": "cm3/100cm3", "unitCode": "cm3/100cm3" },
{ "type": "PropertyValue", "identifier": 34, "name": "wv0010_100-200cm_mean_250", "description": "Volumetric Water Content at 10kPa in 10-3 cm3/cm3 (0.1 v% or 1 mm/m) (100-200)", "unitText": "cm3/100cm3", "unitCode": "cm3/100cm3" },
{ "type": "PropertyValue", "identifier": 34, "name": "wv0033_0-5cm_mean_250", "description": "Volumetric Water Content at 33kPa in 10-3 cm3cm-3 (0.1 v% or 1 mm/m) (0-5)", "unitText": "cm3/100cm3", "unitCode": "cm3/100cm3" },
{ "type": "PropertyValue", "identifier": 34, "name": "wv0033_5-15cm_mean_250", "description": "Volumetric Water Content at 33kPa in 10-3 cm3cm-3 (0.1 v% or 1 mm/m) (5-15)", "unitText": "cm3/100cm3", "unitCode": "cm3/100cm3" },
{ "type": "PropertyValue", "identifier": 34, "name": "wv0033_15-30cm_mean_250", "description": "Volumetric Water Content at 33kPa in 10-3 cm3cm-3 (0.1 v% or 1 mm/m) (15-30)", "unitText": "cm3/100cm3", "unitCode": "cm3/100cm3" },
{ "type": "PropertyValue", "identifier": 34, "name": "wv0033_30-60cm_mean_250", "description": "Volumetric Water Content at 33kPa in 10-3 cm3cm-3 (0.1 v% or 1 mm/m) (30-60)", "unitText": "cm3/100cm3", "unitCode": "cm3/100cm3" },
{ "type": "PropertyValue", "identifier": 34, "name": "wv0033_60-100cm_mean_250", "description": "Volumetric Water Content at 33kPa in 10-3 cm3cm-3 (0.1 v% or 1 mm/m) (60-100)", "unitText": "cm3/100cm3", "unitCode": "cm3/100cm3" },
{ "type": "PropertyValue", "identifier": 34, "name": "wv0033_100-200cm_mean_250", "description": "Volumetric Water Content at 33kPa in 10-3 cm3cm-3 (0.1 v% or 1 mm/m) (100-200)", "unitText": "cm3/100cm3", "unitCode": "cm3/100cm3" },
{ "type": "PropertyValue", "identifier": 34, "name": "wv1500_0-5cm_mean_250", "description": "Volumetric Water Content at 1500kPa in 10-3 cm3cm-3 (0.1 v% or 1 mm/m) (0-5)", "unitText": "cm3/100cm3", "unitCode": "cm3/100cm3" },
{ "type": "PropertyValue", "identifier": 34, "name": "wv1500_5-15cm_mean_250", "description": "Volumetric Water Content at 1500kPa in 10-3 cm3cm-3 (0.1 v% or 1 mm/m) (5-15)", "unitText": "cm3/100cm3", "unitCode": "cm3/100cm3" },
{ "type": "PropertyValue", "identifier": 34, "name": "wv1500_15-30cm_mean_250", "description": "Volumetric Water Content at 1500kPa in 10-3 cm3cm-3 (0.1 v% or 1 mm/m) (15-30)", "unitText": "cm3/100cm3", "unitCode": "cm3/100cm3" },
{ "type": "PropertyValue", "identifier": 34, "name": "wv1500_30-60cm_mean_250", "description": "Volumetric Water Content at 1500kPa in 10-3 cm3cm-3 (0.1 v% or 1 mm/m) (30-60)", "unitText": "cm3/100cm3", "unitCode": "cm3/100cm3" },
{ "type": "PropertyValue", "identifier": 34, "name": "wv1500_60-100cm_mean_250", "description": "Volumetric Water Content at 1500kPa in 10-3 cm3cm-3 (0.1 v% or 1 mm/m) (60-100)", "unitText": "cm3/100cm3", "unitCode": "cm3/100cm3" },
{ "type": "PropertyValue", "identifier": 34, "name": "wv1500_100-200cm_mean_250", "description": "Volumetric Water Content at 1500kPa in 10-3 cm3cm-3 (0.1 v% or 1 mm/m) (100-200)", "unitText": "cm3/100cm3", "unitCode": "cm3/100cm3" }
],
"measurementTechnique": { "type": "DefinedTerm", "name": "D2.8.III.3 INSPIRE Data Specification on Soil, soil profile category", "termCode": "DerivedSoilProfile", "url": "https://inspire.ec.europa.eu/featureconcept/DerivedSoilProfile" },
"gisDataType": { "description": "GIS data type describes the original format. It can be either point, polygonal, raster", "value": "raster" },
"distribution": { "type": "DataDownload", "encodingFormat": "TIF", "lockedForDownload": false },
"size": { "type": "QuantitativeValue", "value": "79", "unitCode": "files" },
"license": { "type": "CreativeWork", "name": "CC BY 4.0", "url": "https://creativecommons.org/licenses/by/4.0/deed.en" },
"citation": "Poggio, L., de Sousa, L. M., Batjes, N. H., Heuvelink, G. B. M., Kempen, B., Ribeiro, E., and Rossiter, D.: SoilGrids 2.0: producing soil information for the globe with quantified spatial uncertainty, SOIL, 7, 217–240, https://doi.org/10.5194/soil-7-217-2021 , 2021.",
"parentProject": null
},
{
"@id": "https://api.soilhive.ag/v1/datasets/8",
"identifier": 8,
"type": "DataSet",
"name": "World Soil Information Service (WoSIS)",
"abstract": "The aim of the World Soil Information Service (WoSIS) is to serve quality-assessed, georeferenced soil data (point, polygon, and grid) to the international community upon their standardisation and harmonisation. So far, the focus has been on developing procedures for legacy point data with special attention to the selection of soil analytical and physical properties considered in the GlobalSoilMap specifications (e.g. organic carbon, soil pH, soil texture (sand, silt, and clay), coarse fragments ( < 2 mm), cation exchange capacity, electrical conductivity, bulk density, and water holding capacity). Profile data managed in WoSIS were contributed by a wide range of soil data providers; the data have been described, sampled, and analysed according to methods and standards in use in the originating countries. Hence, special attention was paid to measures for soil data quality and the standardisation of soil property definitions, soil property values, and soil analytical method descriptions.<br/><br/>At present, WoSIS_latest contains standardized data for 217,000 profiles. The number of measured data for each property varies between profiles and with depth, generally depending on the purpose of the initial studies. Further, in most source data sets, there are fewer data for soil physical as opposed to soil chemical attributes and there are fewer measurements for deeper than for superficial horizons. Generally, limited quality information is associated with the various source data.",
"url": "https://data.isric.org/geonetwork/srv/eng/catalog.search#/metadata/f41367e5-f4d2-4b73-81aa-a472730e1519",
"datePublished": "2020-05-01",
"temporalCoverage": "1918/2013",
"version": "WoSIS latest",
"author": { "type": "Organization", "name": "ISRIC — World Soil Information", "url": "https://www.isric.org/" },
"publisher": { "type": "Organization", "name": "ISRIC — World Soil Information", "url": "https://www.isric.org/" },
"status": { "description": "Dataset status in the system", "value": "ingested" },
"spatialCoverage": { "name": "global", "spatialResolution": "-" },
"variableMeasured": [
{
"type": "PropertyValue",
"identifier": 13,
"name": "BDF133",
"description": "Bulk density fine earth 33 kPa : Bulk density of the fine earth fractions, equilibrated at 33 kPa",
"unitText": "kg/dm3",
"unitCode": "https://qudt.org/vocab/unit/KiloGM-PER-DeciM3"
},
{
"type": "PropertyValue",
"identifier": 13,
"name": "BDFIAD",
"description": "Bulk density fine earth - air dry : Bulk density of the fine earth, air dried",
"unitText": "kg/dm3",
"unitCode": "https://qudt.org/vocab/unit/KiloGM-PER-DeciM3"
},
{
"type": "PropertyValue",
"identifier": 13,
"name": "BDFIFM",
"description": "Bulk density fine earth - field moist : Bulk density of the fine earth fraction, field moist",
"unitText": "kg/dm3",
"unitCode": "https://qudt.org/vocab/unit/KiloGM-PER-DeciM3"
},
{
"type": "PropertyValue",
"identifier": 13,
"name": "BDFIOD",
"description": " Bulk density fine earth - over dry : Bulk density of the fine earth fraction, oven dry",
"unitText": "kg/dm3",
"unitCode": "https://qudt.org/vocab/unit/KiloGM-PER-DeciM3"
},
{
"type": "PropertyValue",
"identifier": 13,
"name": "BDWS33",
"description": "Bulk density whole soil - 33kPa : Bulk density of the whole soil including coarse fragments, equilibrated at 33 kPa",
"unitText": "kg/dm3",
"unitCode": "https://qudt.org/vocab/unit/KiloGM-PER-DeciM3"
},
{
"type": "PropertyValue",
"identifier": 13,
"name": "BDWSOD",
"description": "Bulk density whole soil - oven dry : Bulk density of the whole soil including coarse fragments, oven dry",
"unitText": "kg/dm3",
"unitCode": "https://qudt.org/vocab/unit/KiloGM-PER-DeciM3"
},
{
"type": "PropertyValue",
"identifier": 9,
"name": "СЕСРН7",
"description": "Cation cxchange capacity - buffered at pH7 : Capacity of Capacity of the fine earth fraction to hold exchangeable cations, estimated by buffering the soil at 'pH7'",
"unitText": "cmolc/kg",
"unitCode": "cmolc/kg"
},
{
"type": "PropertyValue",
"identifier": 9,
"name": "СЕСРН8",
"description": "Cation cxchange capacity - buffered at рН8 : Capacity of the fine earth fraction to hold exchangeable cations, estimated by buffering the soil at 'pH8",
"unitText": "cmolc/kg",
"unitCode": "cmolc/kg"
},
{ "type": "PropertyValue", "identifier": 14, "name": "CFGR", "description": "Coarse fragments gravimetric total : Gravimetric content of coarse fragments in the whole soil", "unitText": "g/100g", "unitCode": "g/100g" },
{ "type": "PropertyValue", "identifier": 14, "name": "CFVO", "description": "Coarse fragments volumetric total : Volumetric content of coarse fragments in the whole soil", "unitText": "cm3/100cm3", "unitCode": "cm3/100cm3" },
{
"type": "PropertyValue",
"identifier": 10,
"name": "CLAY",
"description": "Clay total : Gravimetric content of < X mm soil material in the fine earth fraction (e.g. X = 0.002 mm as specified in the analytical method description)",
"unitText": "g/100g",
"unitCode": "g/100g"
},
{
"type": "PropertyValue",
"identifier": 9,
"name": "ЕСЕС",
"description": "Effective cation exchange capacity : Capacity of the fine earth fraction to hold exchangeable cations at the pH of the soil (ECEC). Conventionally approximated by summation of exchangeable bases (Ca2+, Mg2+, K+, and Na+) plus 1 N KCl exchangeable acidity (Al3+ and H+) in acidic soils.",
"unitText": "cmolc/kg",
"unitCode": "cmolc/kg"
},
{
"type": "PropertyValue",
"identifier": 2,
"name": "ELCO20",
"description": "Electrical conductivity - ratio 1:2 : Ability of a 1:2 soil water extract to conduct electrical current",
"unitText": "dS/m",
"unitCode": "https://qudt.org/vocab/unit/DeciS-PER-M"
},
{
"type": "PropertyValue",
"identifier": 2,
"name": "ELCO25",
"description": "Electrical conductivity - ratio 1:2.5 : Ability of a 1:2.5 soil water extract to conduct electrical current",
"unitText": "dS/m",
"unitCode": "https://qudt.org/vocab/unit/DeciS-PER-M"
},
{
"type": "PropertyValue",
"identifier": 2,
"name": "ELCO50",
"description": "Electrical conductivity - ratio 1:5 : Ability of a 1:5 soil water extract to conduct electrical current",
"unitText": "dS/m",
"unitCode": "https://qudt.org/vocab/unit/DeciS-PER-M"
},
{
"type": "PropertyValue",
"identifier": 2,
"name": "ELCOSP",
"description": "Electrical conductivity - saturated paste : Ability of a water saturated soil paste to conduct electrical current (ECe)",
"unitText": "dS/m",
"unitCode": "https://qudt.org/vocab/unit/DeciS-PER-M"
},
{
"type": "PropertyValue",
"identifier": 3,
"name": "NITKJD",
"description": "Total nitrogen : The sum of total Kjeldahl nitrogen (ammonia, organic and reduced nitrogen) and nitrate-nitrite",
"unitText": "g/kg",
"unitCode": "https://qudt.org/vocab/unit/GM-PER-KiloGM"
},
{ "type": "PropertyValue", "identifier": 15, "name": "ORGC", "description": "Organic carbon : Gravimetric content of organic carbon in the fine earth fraction", "unitText": "g/kg", "unitCode": "https://qudt.org/vocab/unit/GM-PER-KiloGM" },
{ "type": "PropertyValue", "identifier": 1, "name": "PHAQ", "description": "pH H20 : A measure of the acidity or alkalinity in soils, defined as the negative logarithm (base 10) of the activity of hydronium ions (H+) in water" },
{
"type": "PropertyValue",
"identifier": 1,
"name": "PHCA",
"description": "pH CaCl2 : A measure of the acidity or alkalinity in soils, defined as the negative logarithm (base 10) of the activity of hydronium ions (H+) in a CaCl2 solution, as specified in the analytical method descriptions"
},
{
"type": "PropertyValue",
"identifier": 1,
"name": "PHKC",
"description": "pH KCl : A measure of the acidity or alkalinity in soils, defined as the negative logarithm (base 10) of the activity of hydronium ions (H+) in a KCl solution, as specified in the analytical method descriptions"
},
{
"type": "PropertyValue",
"identifier": 1,
"name": "PHNF",
"description": "pH NaF : A measure of the acidity or alkalinity in soils, defined as the negative logarithm (base 10) of the activity of hydronium ions (H+) in a NaF solution, as specified in the analytical method descriptions"
},
{
"type": "PropertyValue",
"identifier": 4,
"name": "PHETB1 [PHPBYI]",
"description": "Phosphorus (P) - Bray I : Measured according to the Bray-I method, a combination of HCl and NH4F to remove easily acid soluble P forms, largely Al- and Fe-phosphates (for acid soils)",
"unitText": "mg/kg",
"unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM"
},
{
"type": "PropertyValue",
"identifier": 4,
"name": "PHETM3 [PHPMH3]",
"description": "Phosphorus (P) - Mehlich 3 : Measured according to the Mehlich-3 extractant, a combination of acids (acetic [HOAc] and nitric [HNO3]), salts (ammonium fluoride [NH4F] and ammonium nitrate [NH4 NO3]), and the chelating agent ethylenediaminetetraacetic acid (EDTA); considered suitable for removing P and other elements in acid and neutral soils",
"unitText": "mg/kg",
"unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM"
},
{
"type": "PropertyValue",
"identifier": 4,
"name": "PHETOL [PHPOLS]",
"description": "Phosphorus (P) - Olsen : Retention measured according to the New Zealand method",
"unitText": "mg/kg",
"unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM"
},
{
"type": "PropertyValue",
"identifier": 4,
"name": "PHPTOT",
"description": "Phosphorus (P) - total : Determined with a very strong acid (aqua regia and sulfuric acid/nitric acid)",
"unitText": "mg/kg",
"unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM"
},
{
"type": "PropertyValue",
"identifier": 4,
"name": "PHPWSL",
"description": "Phosphorus (P) - water soluble : Measured in 1:x soil:water solution (mainly determines P in dissolved forms)",
"unitText": "mg/kg",
"unitCode": "https://qudt.org/vocab/unit/MilliGM-PER-KiloGM"
},
{
"type": "PropertyValue",
"identifier": 12,
"name": "SAND",
"description": "Sand total : Y to Z mm fraction of the fine earth fraction; Z upper limit as specified in the analytical method description for the sand fraction (e.g. Y = 0.05 mm to Z= 2 mm)",
"unitText": "g/100g",
"unitCode": "g/100g"
},
{
"type": "PropertyValue",
"identifier": 11,
"name": "SILT",
"description": "Silt total : X to Y mm fraction of the fine earth fraction; X upper limit as specified in the analytical method description for the clay fraction (e.g. X= 0.002 mm to Y = 0.05 mm)",
"unitText": "g/100g",
"unitCode": "g/100g"
},
{
"type": "PropertyValue",
"identifier": 8,
"name": "TCEQ",
"description": "Calcium carbonate equivalent total : The content of carbonate in a liming material or calcareous soil calculated as if all of the carbonate is in the form of CaCO3 (in the fine earth fraction); also known as inorganic carbon",
"unitText": "g/kg",
"unitCode": "https://qudt.org/vocab/unit/GM-PER-KiloGM"
},
{
"type": "PropertyValue",
"identifier": 18,
"name": "TOTC",
"description": "Total carbon : Gravimetric content of organic carbon and inorganic carbon in the fine earth fraction",
"unitText": "g/kg",
"unitCode": "https://qudt.org/vocab/unit/GM-PER-KiloGM"
},
{ "type": "PropertyValue", "identifier": 48, "name": "WG0006", "description": "Water retention gravimetric - 6 kPa : Soil moisture content by weight, at tension 6 kPa (pF 1.8)", "unitText": "g/100g", "unitCode": "g/100g" },
{ "type": "PropertyValue", "identifier": 48, "name": "WG0010", "description": "Water retention gravimetric - 10 kPa : Soil moisture content by weight, at tension 10 kPa (pF 2.0)", "unitText": "g/100g", "unitCode": "g/100g" },
{ "type": "PropertyValue", "identifier": 48, "name": "WG0033", "description": "Water retention gravimetric - 33 kPa : Soil moisture content by weight, at tension 33 kPa (pF 2.0)", "unitText": "g/100g", "unitCode": "g/100g" },
{ "type": "PropertyValue", "identifier": 48, "name": "WG0100", "description": "Water retention gravimetric - 100 kPa : Soil moisture content by weight, at tension 100 kPa (pF 3.0)", "unitText": "g/100g", "unitCode": "g/100g" },
{ "type": "PropertyValue", "identifier": 48, "name": "WG0200", "description": "Water retention gravimetric - 200 kPa : Soil moisture content by weight, at tension 200 kPa (pF 3.3)", "unitText": "g/100g", "unitCode": "g/100g" },
{ "type": "PropertyValue", "identifier": 48, "name": "WG0500", "description": "Water retention gravimetric - 500 kPa : Soil moisture content by weight, at tension 500 kPa (pF 3.7)", "unitText": "g/100g", "unitCode": "g/100g" },
{ "type": "PropertyValue", "identifier": 48, "name": "WG1500", "description": "Water retention gravimetric - 1500 kPa : Soil moisture content by weight, at tension 1500 kPa (pF 4.2)", "unitText": "g/100g", "unitCode": "g/100g" },
{ "type": "PropertyValue", "identifier": 49, "name": "WV0010", "description": "Water retention volumetric - 10 kPa : Soil moisture content by volume, at tension 10 kPa (pF 2.0)", "unitText": "cm3/100cm3", "unitCode": "cm3/100cm3" },
{ "type": "PropertyValue", "identifier": 49, "name": "WV0033", "description": "Water retention volumetric - 33 kPa : Soil moisture content by volume, at tension 33 kPa (pF 2.0)", "unitText": "cm3/100cm3", "unitCode": "cm3/100cm3" },
{ "type": "PropertyValue", "identifier": 49, "name": "WV0100", "description": "Water retention volumetric - 100 kPa : Soil moisture content by volume, at tension 100 kPa (pF 3.0)", "unitText": "cm3/100cm3", "unitCode": "cm3/100cm3" },
{ "type": "PropertyValue", "identifier": 49, "name": "WV0200", "description": "Water retention volumetric - 200 kPa : Soil moisture content by volume, at tension 200 kPa (pF 3.3)", "unitText": "cm3/100cm3", "unitCode": "cm3/100cm3" },
{ "type": "PropertyValue", "identifier": 49, "name": "WV0500", "description": "Water retention volumetric - 500 kPa : Soil moisture content by volume, at tension 500 kPa (pF 3.7)", "unitText": "cm3/100cm3", "unitCode": "cm3/100cm3" },
{ "type": "PropertyValue", "identifier": 49, "name": "WV1500", "description": "Water retention volumetric - 1500 kPa : Soil moisture content by volume, at tension 1500 kPa (pF 4.2)", "unitText": "cm3/100cm3", "unitCode": "cm3/100cm3" }
],
"measurementTechnique": { "type": "DefinedTerm", "name": "D2.8.III.3 INSPIRE Data Specification on Soil, soil profile category", "termCode": "ObservedSoilProfile", "url": "https://inspire.ec.europa.eu/featureconcept/ObservedSoilProfile" },
"gisDataType": { "description": "GIS data type describes the original format. It can be either point, polygonal, raster", "value": "point" },
"distribution": { "type": "DataDownload", "encodingFormat": "GeoJSON", "lockedForDownload": false },
"size": { "type": "QuantitativeValue", "value": "438951", "unitCode": "data points" },
"license": "WoSIS data holds different licenses on a record-level basis.This information is not available for few of the records. ISRIC is working on releasing an updated version of the dataset",
"citation": "Batjes, N. H., Ribeiro, E., van Oostrum, A., Leenaars, J., Hengl, T., and Mendes de Jesus, J.: WoSIS: providing standardised soil profile data for the world, Earth Syst. Sci. Data, 9, 1–14, ESSD - WoSIS: providing standardised soil profile data for the world , 2017.",
"parentProject": null
},
{
"@id": "https://api.soilhive.ag/v1/datasets/33",
"identifier": 33,
"type": "DataSet",
"name": "Wyss Academy Naibunga Soil Parameters",
"abstract": "The Wyss Academy Naibunga Soil Parameters dataset, contributed by the Wyss Academy for Nature at the University of Bern, was donated as part of the World Bank Data4SoilHealth Challenge 2025 for Kenya. Developed through a previous partnership with the Kenya Agricultural and Livestock Research Organization (KALRO), this dataset consists of 48 georeferenced soil sample points from the Naibunga Conservancy. It includes key soil health indicators such as pH, Total Nitrogen, Total Organic Carbon, Phosphorus, Potassium, Calcium, Magnesium, Manganese, Copper, Iron, Zinc, and Sodium. Last year, KALRO conducted an extensive soil characteristics study for the Wyss Academy in the Naibunga area, where semi-circular bunds were dug. <a href=\"https://www.wyssacademy.org/post/semi-circular-bunds-project-vegetation-is-growing-and-elephants-are-visiting\" target=\"_blank\">More info</a>",
"datePublished": "2024-05-11",
"temporalCoverage": "2023/2023",
"version": "-",
"author": { "type": "Organization", "name": "Wyss Academy for Nature at the University of Bern", "url": "https://www.wyssacademy.org/" },
"publisher": { "type": "Organization", "name": "Wyss Academy for Nature at the University of Bern", "url": "https://www.wyssacademy.org/" },
"status": { "description": "Dataset status in the system", "value": "ingested" },
"spatialCoverage": { "name": "global", "spatialResolution": "-" },
"variableMeasured": [
{ "type": "PropertyValue", "identifier": 1, "name": "Soil pH", "description": "The measure of the acidity or alkalinity of the soil, expressed as pH value." },
{ "type": "PropertyValue", "identifier": 3, "name": "Total Nitrogen", "description": "The total nitrogen content in the soil, expressed as a percentage.", "unitText": "%", "unitCode": "https://qudt.org/vocab/unit/PERCENT" },
{
"type": "PropertyValue",
"identifier": 18,
"name": "Total Org. Carbon",
"description": "The percentage of organic carbon present in the soil, which is crucial for soil fertility and carbon sequestration.",
"unitText": "%",
"unitCode": "https://qudt.org/vocab/unit/PERCENT"
},
{
"type": "PropertyValue",
"identifier": 4,
"name": "Phosphorus (Mehlich)",
"description": "The concentration of phosphorus in the soil, measured in parts per million (ppm), using the Mehlich extraction method.",
"unitText": "ppm",
"unitCode": "https://qudt.org/vocab/unit/PPM"
},
{
"type": "PropertyValue",
"identifier": 4,
"name": "Phosphorus (Olsen)",
"description": "The concentration of phosphorus in the soil, measured in parts per million (ppm), using the Olsen extraction method.",
"unitText": "ppm",
"unitCode": "https://qudt.org/vocab/unit/PPM"
},
{
"type": "PropertyValue",
"identifier": 5,
"name": "Potassium_exchangeable",
"description": "The concentration of exchangeable potassium in the soil, expressed in milliequivalents per 100 grams (meq%).",
"unitText": "meq%",
"unitCode": "meq%"
},
{
"type": "PropertyValue",
"identifier": 30,
"name": "Calcium_exchangeable",
"description": "The concentration of exchangeable calcium in the soil, expressed in milliequivalents per 100 grams (meq%).",
"unitText": "meq%",
"unitCode": "meq%"
},
{
"type": "PropertyValue",
"identifier": 31,
"name": "Magnesium_exchangeable",
"description": "The concentration of exchangeable magnesium in the soil, expressed in milliequivalents per 100 grams (meq%).",
"unitText": "meq%",
"unitCode": "meq%"
},
{ "type": "PropertyValue", "identifier": 21, "name": "Manganese_exchangeable", "description": "The concentration of manganese in the soil, expressed in milliequivalents per 100 grams (meq%).", "unitText": "meq%", "unitCode": "meq%" },
{ "type": "PropertyValue", "identifier": 20, "name": "Copper", "description": "The concentration of copper in the soil, measured in parts per million (ppm).", "unitText": "ppm", "unitCode": "https://qudt.org/vocab/unit/PPM" },
{ "type": "PropertyValue", "identifier": 7, "name": "Iron", "description": "The concentration of iron in the soil, measured in parts per million (ppm).", "unitText": "ppm", "unitCode": "https://qudt.org/vocab/unit/PPM" },
{ "type": "PropertyValue", "identifier": 23, "name": "Zinc", "description": "The concentration of zinc in the soil, measured in parts per million (ppm).", "unitText": "ppm", "unitCode": "https://qudt.org/vocab/unit/PPM" },
{ "type": "PropertyValue", "identifier": 28, "name": "Sodium", "description": "The concentration of exchangeable sodium in the soil, expressed in milliequivalents per 100 grams (meq%).", "unitText": "meq%", "unitCode": "meq%" },
{
"type": "PropertyValue",
"identifier": 2,
"name": "Electr. Conductivity",
"description": "The ability of the soil to conduct electrical current, measured in millisiemens per centimeter (mS/cm), which is used as an indicator of soil salinity.",
"unitText": "mS/cm",
"unitCode": "mS/cm"
}
],
"measurementTechnique": { "type": "DefinedTerm", "name": "D2.8.III.3 INSPIRE Data Specification on Soil, soil profile category", "termCode": "ObservedSoilProfile", "url": "https://inspire.ec.europa.eu/featureconcept/ObservedSoilProfile" },
"gisDataType": { "description": "GIS data type describes the original format. It can be either point, polygonal, raster", "value": "point" },
"distribution": { "type": "DataDownload", "encodingFormat": "GeoJSON", "lockedForDownload": false },
"size": { "type": "QuantitativeValue", "value": "32", "unitCode": "data points" },
"license": { "type": "CreativeWork", "name": "CC BY 4.0", "url": "https://creativecommons.org/licenses/by/4.0/deed.en" },
"citation": "Wyss Academy for Nature at the University of Bern. (2024). Wyss Academy Naibunga soil parameters [Data set]. SoilHive. Retrieved from https://app.soilhive.ag/availability",
"parentProject": null
}
]
}
Response contains metadata for 11 datasets:
| Dataset name | Identifier | GIS data type |
|---|---|---|
| Africa SoilGrids nutrients | 25 | raster |
| Africa SoilGrid properties | 31 | raster |
| CAROB Project - Soil Samples | 38 | point |
| DownForce Technologies Limited - Soil Organic Carbon Stock in percentages for selected areas of Kenya | 39 | raster |
| Harmonized World Soil Database | 4 | polygonal |
| iSDA Africa Field Data | 12 | point |
| iSDAsoil | 17 | raster |
| Biophysical baseline assessment within the KCEP-CRAL action areas in Kenya, using the LDSF | 28 | point |
| SoilGrids — global gridded soil information | 19 | raster |
| World Soil Information Service (WoSIS) | 8 | point |
| Wyss Academy Naibunga Soil Parameters | 33 | point |
Inside each DataSet item we can find the variableMeasured field with the list of soil properties contained in the dataset.
Taking Biophysical baseline assessment within the KCEP-CRAL action areas in Kenya, using the LDSF (identifier: 28) as an example:
"variableMeasured": [
{ "type": "PropertyValue", "identifier": 15, "name": "predSOC", "description": "Predicted Soil Organic Carbon (SOC) content", "unitText": "g/kg", "unitCode": "https://qudt.org/vocab/unit/GM-PER-KiloGM" },
{ "type": "PropertyValue", "identifier": 3, "name": "predTN", "description": "Predicted Total Nitrogen content", "unitText": "%", "unitCode": "https://qudt.org/vocab/unit/PERCENT" },
{ "type": "PropertyValue", "identifier": 1, "name": "predpH", "description": "Predicted Soil pH in water (soil: water ratio of 1:2 weight to volume basis)" },
{ "type": "PropertyValue", "identifier": 24, "name": "predExBas", "description": "Predicted Exchangeable bases (sum of Mehlich-3 Ca, Mg, K, Na)", "unitText": "cmolc/kg", "unitCode": "cmolc/kg" },
{ "type": "PropertyValue", "identifier": 12, "name": "predSand", "description": "Predicted Sand content of calgon dispersed particles after 4 minutes of ultrasonication", "unitText": "%", "unitCode": "https://qudt.org/vocab/unit/PERCENT" },
{ "type": "PropertyValue", "identifier": 10, "name": "predClay", "description": "Predicted Clay content of calgon dispersed particles after 4 minutes of ultrasonication", "unitText": "%", "unitCode": "https://qudt.org/vocab/unit/PERCENT" }
]
As expected, dataset contains three of the requested properties:
| Soil property | Identifier |
|---|---|
| pH | 1 |
| Clay (%) | 10 |
| Sand (%) | 12 |
Step 5: Downloading the data for entire Kenya country
We can now add a dataset key to the payload in Step 4 to request data for datasets 25 and 28:
| Dataset name | Identifier | GIS data type |
|---|---|---|
| Africa SoilGrids nutrients | 25 | raster |
| Biophysical baseline assessment within the KCEP-CRAL action areas in Kenya, using the LDSF | 28 | point |
curl --request POST \
--url 'https://api.soilhive.ag/v1/soil-data-by-geometry/queries' \
--header 'accept: application/json' \
--header 'authorization: Bearer {token}' \
--header 'content-type: application/json' \
--data '{
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35.6106412692563 4.620013637130017, 35.61213997259352 4.619497503957262, 35.7003648787963 4.58911053903271, 35.70581185934157 4.619260166817299, 35.705845603928786 4.619447032261671, 35.705938715425816 4.619962564580918, 35.711518338938454 4.661608022570997, 35.73940198748288 4.68112644889826, 35.77843910019294 4.6783381881118276, 35.78122154724037 4.619922006968394, 35.85653615124879 4.619603554603345, 35.92083541075094 4.619331668386041, 35.922799111594685 4.602071550230631, 35.936028280550495 4.578533113756923, 35.93706180836393 4.559257733053731, 35.93406457594072 4.539207251392013, 35.93375451753059 4.522179964229452, 35.94047245333777 4.5080463876065995, 35.95835250024991 4.49685849532888, 35.99710982236534 4.462958641099516, 36.0184005098982 4.44913510503617, 36.04134484622056 4.443683260807328, 36.04532476737086 4.443716307749787, 36.191309856945466 4.444923722856816, 36.22572636136192 4.449600466071879, 36.236268353319964 4.449652139472871, 36.24608687294918 4.446990658895358, 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4.188014094135631, 34.00601688753375 4.205713434893361, 33.97707808672042 4.219691990556827)), ((41.05396569132489 -2.049574508127357, 41.06568444065387 -2.0363094696472546, 41.0927840495704 -2.0380184466676217, 41.12273196702598 -2.0477841154820635, 41.143321159947426 -2.059502857984626, 41.16277102995986 -2.0909156192241904, 41.15528405044375 -2.1120745183561187, 41.13689212328376 -2.115492472419104, 41.12338300898644 -2.0936825487189514, 41.12427819071233 -2.1046688510808935, 41.12281334757257 -2.1158994003244596, 41.11890709642095 -2.124281454239061, 41.112559440259254 -2.1276994083056593, 41.10962975451415 -2.129001607646856, 41.1077580083875 -2.1315242902791653, 41.10482832089333 -2.134047123125383, 41.098887565516236 -2.1353491722539566, 41.09197024778029 -2.1329891706551747, 41.08643639469092 -2.1283505830829066, 41.082855664981764 -2.1237118452991726, 41.08179772139522 -2.1215145247369973, 41.06861412945868 -2.1234677486411258, 41.05079186255787 -2.1294898009631664, 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"soilProperties": [1, 6, 7, 9, 10, 11, 12, 15, 21, 27, 42, 50, 51],
"datasets": [25, 28]
}'
{
"Location": "https://api.soilhive.ag/v1/soil-data-by-geometry/queries/{query-id}"
}
After starting the async data request we can check the status following the provided redirect link:
curl 'https://api.soilhive.ag/v1/soil-data-by-geometry/queries/{query-id} --header 'Authorization: Bearer {token}'
{
"@context": "https://api.soilhive.ag/v1/core.jsonld",
"@id": "https://api.soilhive.ag/v1/soil-data-by-geometry/queries/{query-id}",
"type": "Action",
"actionStatus": "Pending",
"startTime": "2025-04-04T09:27:07.119Z",
"estimatedEndTime": "2025-04-05T22:33:07.119Z",
"potentialAction": [
{
"description": "Check query status",
"target": {
"url": "https://api.soilhive.ag/v1/soil-data-by-geometry/queries/{query-id}",
"httpMethod": "GET"
}
}
]
}
After a while, the response will contain the download link (valid for one week):
{
"@context": "https://api.soilhive.ag/v1/core.jsonld",
"@id": "https://api.soilhive.ag/v1/soil-data-by-geometry/queries/{query-id}",
"type": "Action",
"actionStatus": "Completed",
"description": "Completed file, ready for download",
"startTime": "2025-04-04T09:27:07.119Z",
"endTime": "2025-04-04T09:30:12.751Z",
"result": {
"type": "DataDownload",
"url": ".../download/{query-id}.zip...",
"expires": "2025-04-11T09:30:12.751541"
}
}
ZIP file structure will be similar to this one:
- response/
- AfSIS_Nutrient/
- af250m_nutrient_al_m_agg_0_30_cm.tif
- af250m_nutrient_fe_m_agg_0_30_cm.tif
- af250m_nutrient_mn_m_agg_0_30_cm.tif
- hex_grid.geojson
- output_data_points.csv
- output_data.geojson
- output_data.gpkg
- readme.pdf
readme.pdffile contains all the metadata for the requested data.TIFfiles contain raster dataoutput_data*files contain point samples in different formats. Here is an extract from the CSV file:
| id | lat | lon | property | original_name | upper_depth_cm | lower_depth_cm | value | unit | sampling_date | license | h3_index | publication_date | data_source |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | -3.79033 | 39.656 | sand | predSand | 0 | 20 | 44.0 | % | 2019 | CC BY 4.0 | 837b59fffffffff | 2021-01-01 | KCEP-CRAL |
| 2 | -3.79033 | 39.656 | sand | predSand | 20 | 50 | 40.0 | % | 2019 | CC BY 4.0 | 837b59fffffffff | 2021-01-01 | KCEP-CRAL |
| 3 | -3.79033 | 39.656 | pH | predpH | 0 | 20 | 6.11 | 2019 | CC BY 4.0 | 837b59fffffffff | 2021-01-01 | KCEP-CRAL | |
| 4 | -3.79033 | 39.656 | pH | predpH | 20 | 50 | 5.98 | 2019 | CC BY 4.0 | 837b59fffffffff | 2021-01-01 | KCEP-CRAL | |
| 5 | -3.79033 | 39.656 | occ | predSOC | 0 | 20 | 5.33 | g/kg | 2019 | CC BY 4.0 | 837b59fffffffff | 2021-01-01 | KCEP-CRAL |
| 6 | -3.79033 | 39.656 | occ | predSOC | 20 | 50 | 3.26 | g/kg | 2019 | CC BY 4.0 | 837b59fffffffff | 2021-01-01 | KCEP-CRAL |
Subsequent steps
Using provided data with geostatistical techniques (e.g., kriging) or rule-based scoring models spatial risk maps can be created (i.e.: by classifying areas according to acidity severity: low, moderate, high).
Data can later be combined with population density or cropland maps to assess the potential impact on food security and prioritize areas for liming or intervention.
Additional data sources that can be used to support this use case are:
Updated 29 days ago