Area- and Depth-Weighted Averages of Selected SSURGO Variables for the Conterminous United States and District of Columbia
This digital data release consists of seven national data files of area- and 
depth-weighted averages of select  soil attributes for every available county 
in the conterminous United States and the District of Columbia as of March 
2014. The files are derived from Natural Resources Conservations Service’s 
(NRCS) …