Soil Research and Laboratory

National Cooperative Soil Survey Soil Characterization Data homepage - Kellogg Soil Survey Laboratory site specific data with search routines.

Rapid Carbon Assessment - A project that collected soil carbon data from more than 6,000 sites across the conterminous U.S.

Research and Research-Related Activities

Soil Climate Research Stations in Antarctica and Alaska - data from seven long-term soil-climate stations in Antarctica and Alaska.

Soil Geochemistry Spatial Database homepage - access to selected data.