Natural Resources & Environmental Sciences Soil Productivity and Management
Funk Library - Soil Survey Database
The Funk Library holds the vast majority of published USDA county soil survey maps. Search the database by county or state to find the call number and year of the survey you're looking for.
Worldwide Soil Health Information Portal
Database of selected, annotated Web site references on soil health and related ecologically sound, sustainable agricultural strategies around the world. (Cornell University)