A number of databases have been developed and extended to support the new data collection efforts, new techniques in laboratory analysis, and continent-wide digital soil mapping undertaken by AfSIS. Where feasible these databases are being developing in compliance with, or will be mapped to, rapidly developing international standards for the exchange of soil data.
The Africa Soil Profiles Database now contains over 18,500 georeferenced legacy soil profile records for 40 countries. Check at http://www.isric.org/explore/soilgrids, to view and download the full database.
The ICRAF-ISRIC VNIR spectral library of world soils provides a valuable resource for research and applications for sensing soil quality both in the laboratory and from space.
The Soil Survey (LDSF) Field Database comprised of georeferenced data and images collected using the Land Degradation Surveillance will further ensure that sampling locations can be revisited at later points in time to quantify where specific changes occurred.
The Soil Analytical Database provides reference laboratory measurements for one of 10 plots for all 16 clusters in each sentinel landscape, for a total of 32 reference samples (that is, top- and sub- soil from 16 plots) per sentinel landscape. The samples from the remaining nine plots are analyzed using spectral diagnostics. The Soil Spectral Database contains both spectral measurements from the reference samples and the remaining nine samples from each cluster for all of the AfSIS sentinel landscapes. Check back soon to view and download these databases.
The legacy and new field trial databases are being analyzed in combination with remote sensing data to derive key determinants of crop response and resource use efficiency. Check back soon for data and case studies.