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Soil loss tolerance for a specific soil, also known as the T value, is the maximum average annual

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.^[2]

A commonly used equation to calculate the T value is:

^ "T Value". NRCS-USDA State Office of Michigan. Retrieved 9 December 2015.
^ "Soil Erosion on Cropland 2007 | NRCS". Nrcs.usda.gov. Retrieved 2011-09-11.

[1] "T Value". NRCS-USDA State Office of Michigan. Retrieved 9 December 2015.

[2] "Soil Erosion on Cropland 2007 | NRCS". Nrcs.usda.gov. Retrieved 2011-09-11.

[2]