d9eca770-29a4-4d95-bf93-f32e1ab419c3 dataset Data infodesk ISRIC - World Soil Information data@isric.org 2025-02-05T10:33:05 ISO 19115:2003/19139 2003/Cor.1:2006 4326 EPSG WISE derived soil properties on a 0.5 by 0.5 degree global grid, version 3.0 2005-12-01 d9eca770-29a4-4d95-bf93-f32e1ab419c3 This harmonized, gridded global data set of soil parameter estimates includes files listing: (1) soil parameter estimates for the component soil units of each terrestrial grid cell, in un-binned format, and (2) soil parameter estimates aggregated or binned into a number of predefined classes. The spatial data, with a resolution of ½ by ½ degree, was derived from the ISRIC-WISE soil database. The land surface between longitudes -180o W and +180o E and latitudes +90o N and -90o S has been characterized using 45948 unique map units; each of these can comprise from one to ten soil units, characterized according to the original legend of the 1:5 million scale Soil Map of the World (FAO-Unesco 1974). Soil parameter estimates for each of these units were derived from analyses of some 9600 profiles held in a working copy of WISE (ver. 2.0). Twenty-two soil variables, identified as being useful for agro-ecological zoning, land evaluation, crop growth simulation, modelling of soil gaseous emissions and analyses of global environmental change, were considered. Parameter estimates for the topsoil (0-30 cm) and the subsoil (30-100 cm) are presented for the following variables: content of organic carbon, total nitrogen, the C/N ratio, pH(H2O), CECsoil, CECclay, base saturation, total exchangeable bases, aluminum saturation, exchangeable sodium percentage (ESP), electrical conductivity of saturated paste (ECe), calcium carbonate content, gypsum content, content of sand, silt and clay, content of fragments less than 2 mm, bulk density, total porosity. For soil drainage class, effective soil depth, and available water capacity (-10 to -1500 kPa), however, parameter estimates are presented on a profile basis. The parameter estimates - median values - presented here should be seen as best estimates; possible types and sources of uncertainty are discussed in the report. The data are considered appropriate for exploratory studies at global scale (greater than 1:5 000 000). Note: A more recent assessment, at a resolution of 30arcsec (WISE30sec), is available at: http://data.isric.org/geonetwork/srv/eng/catalog.search#/metadata/dc7b283a-8f19-45e1-aaed-e9bd515119bc Niels Batjes ISRIC - World Soil Information Senior Soil Scientist PO Box 353 Wageningen 6700AJ Netherlands niels.batjes@isric.org Data info desk ISRIC - World Soil Information (WDC - Soils) data@isric.org Data info desk ISRIC - World Soil Information (WDC - Soils) data@isric.org https://files.isric.org/public/thumbnails/wise/wise_30min_v3.jpg calcium carbon cation exchange capacity electrical conductivity nitrogen organic carbon bulk density soil classification soil depth soil profiles pH salinity texture water holding capacity nutrients Soil science Stratum Global Region Attribution 3.0 International (CC BY 3.0) 30 geoscientificInformation 1995-08-01 2005-12-01 -180.00 180.00 -90.00 90.00 zip Data onfo desk ISRIC - World Soil Information (WDC - Soils) data@isric.org https://files.isric.org/public/wise/wise_30min_v3.zip WWW:DOWNLOAD-1.0-ftp--download Download https://www.isric.org/projects/world-inventory-soil-emission-potentials-wise WWW:LINK-1.0-http--related Project webpage https://library.wur.nl/WebQuery/wurpubs/fulltext/286181 WWW:LINK-1.0-http--related Report Batjes NH 2005. ISRIC-WISE global data set of derived soil properties on a 0.5 by 0.5 degree grid (ver. 3.0). Report 2005/08, ISRIC - World Soil Information, Wageningen, https://library.wur.nl/WebQuery/wurpubs/fulltext/286181