Geoscience Reference
In-Depth Information
Soil Survey Staff (1960) Soil classification—a comprehensive system (seventh approximation).
USDA, Soil Conservation Service, US Govt. Print. Office, Washington, DC
Soil Survey Staff (1999) Soil taxonomy: a basic system of soil classification for making and
interpreting soil surveys, 2nd edn. United States Department of Agriculture Natural Resources
Conservation Service. Agric. Handbook No. 436, Superintendent of Documents,
U.S. Government Printing Office, Washington, DC 20402
Soil Survey Staff (2010) Keys to soil taxonomy, 11th edn. USDA, National Resources Conserva-
tion Service, National Soil Survey Center, Lincoln
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