Percentage of area with clay in Topsoil.
Data Sources & Credits
Sanchez, P.A., C.A. Palm and S.W. Buol (2003). Fertility Capability Soil Classification System: A Tool to Assess Soil Quality in the Tropics. Geoderma, v.114:157-185.
HarvestChoice, 2014. "Clay in Topsoil (percent of Area)." International Food Policy Research Institute, Washington, DC., and University of Minnesota, St. Paul, MN. Available online at http://harvestchoice.org/data/sclay.