65429343-4283-4a97-a630-d8105a686c33 dataset Data infodesk ISRIC - World Soil Information data@isric.org 2025-02-05T09:48:15 ISO 19115:2003/19139 2003/Cor.1:2006 4326 EPSG Soil Dataset for Pedotransfer Function Development (IGBP-DIS) 1996-10-01 65429343-4283-4a97-a630-d8105a686c33 This uniform soil data set for the development of pedotransfer functions was developed at the request of the Global Soil Data Task (GSDT) of the Data and Information System (DIS) of the International Geosphere Biosphere Programme (IGBP). The necessary chemical and physical soil data have been derived from ISRIC's Soil Information System (ISIS) and the soil CD-ROM of the Natural Resources Conservation Service (USDA-NRCS). Analytical data were clustered into functional groups based on soil textural class (FAO) and calculated activity of the clay size minerals. Samples from organic and allophanic soils were flagged as separate categories. The file contain analytical data for 131,472 soil samples, originating from 20,920 profiles. Being based on available data, there are several gaps in the measured data Piet Tempel ISRIC - World Soil Information Former staff PO Box 353 Wageningen 6700AJ Netherlands None 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/other/IGBP-DIS_PTFset.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) 1000000 geoscientificInformation 1950-01-01 1995-01-01 -180.00 180.00 -90.00 90.00 zip Data info desk ISRIC - World Soil Information (WDC - Soils) darta@isric.org Data info desk ISRIC - World Soil Information (WDC - Soils) data@isric.org https://files.isric.org/public/other/IGBP-DIS_PTFset.zip WWW:DOWNLOAD-1.0-ftp--download Download https://library.wur.nl/WebQuery/wurpubs/fulltext/287417 WWW:LINK-1.0-http--related Report http://www.igbp.net/about.4.6285fa5a12be4b403968000417.html WWW:LINK-1.0-http--related Project webpage Tempel P, Batjes NH and van Engelen VWP 1996. IGBP-DIS data set for pedotransfer function development. Work. Pap. 96/06, ISRIC, Wageningen, https://library.wur.nl/WebQuery/wurpubs/fulltext/287417