Soil loss tolerance
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Soil loss tolerance for a specific soil, also known as the T value, is the maximum average annual soil loss expressed as tons per acre per year that will permit current production levels to be maintained economically and indefinitely. T values range from 2 to 5 tons per acre per year. According to the United States Department of Agriculture's National Resource Conservation Service, in 2007 in the US, 99 million acres (28% of all cropland) were eroding above soil loss tolerance (T) rates. This was compared to 169 million acres (40% of cropland) in 1982.[1]
[edit] References
- ^ "Soil Erosion on Cropland 2007 | NRCS". Nrcs.usda.gov. http://www.nrcs.usda.gov/wps/portal/nrcs/detail/?ss=16&navtype=SUBNAVIGATION&cid=stelprdb1041887&navid=120110110000000&pnavid=120110000000000&position=Not%20Yet%20Determined.Html&ttype=detail&pname=Soil%20Erosion%20on%20Cropland%202007%20%7C%20NRCS. Retrieved 2011-09-11.
This article incorporates public domain material from the Congressional Research Service document "Report for Congress: Agriculture: A Glossary of Terms, Programs, and Laws, 2005 Edition" by Jasper Womach.
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