Soil Dataset for Pedotransfer Function Development (IGBP-DIS)

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

本用于开发土壤传递函数（Pedotransfer Functions）的标准化土壤数据集，由国际地圈生物圈计划（IGBP）的数据与信息系统（DIS）下属的全球土壤数据工作组（GSDT）委托编制。所需的土壤化学及物理属性数据，来源于国际土壤参考与信息中心（ISRIC）的土壤信息系统（ISIS），以及美国农业部自然资源保护服务局（USDA-NRCS）的土壤光盘数据集。分析数据依据联合国粮农组织（FAO）的土壤质地分类标准，结合黏粒矿物计算活度，被划分为若干功能组；有机土壤与水铝英石土壤的样本被单独标记为独立类别。本数据集涵盖源自20920个土壤剖面的131472份土壤样本的分析数据。由于基于公开可用数据构建，实测数据存在若干缺失项。