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Search results with tag "Keys to soil taxonomy"
Keys to Soil Taxonomy - USDA
www.nrcs.usda.govorganisms, soil fauna, temperature, and moisture all change with the seasons as well as with more extended periods of time. Soil must be viewed from both the short-term and long-term perspective. Buried Soils A buried soil is covered with a surface mantle of new soil material that either is 50 cm or more thick or is 30 to 50 cm