New to soil science? Check out these links to learn more about what's under your feet!

USDA-NRCS

Soil Science Society of America

Web Soil Survey (WSS) provides soil data and information produced by the National Cooperative Soil Survey. It is operated by the USDA Natural Resources Conservation Service (NRCS) and provides access to the largest natural resource information system in the world. NRCS has soil maps and data available online for more than 95 percent of the nation’s counties and anticipates having 100 percent in the near future. The site is updated and maintained online as the single authoritative source of soil survey information.

“Official soil series description” is a term applied to the description approved by the Natural Resources Conservation Service that defines a specific soil series in the United States.