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Summary Report, 1997 NRI, Revised December 2000 - Table 12

Table 12 - Estimated average annual sheet and rill erosion in relation to
T value on nonfederal rural land, by land cover/use and year
(data per 1,000 acres)
Land cover/use Year Sheet and rill erosion Total
≤ T > T ≤ 2T > 2T ≤ 3T > 3T ≤ 4T > 4T ≤ 5T > 5T
Cultivated cropland 1982 276,503.1 52,856.3 18,574.2 9,103.2 5,610.6 13,802.1 376,449.5
1987 273,924.9 48,249.1 16,511.3 8,385.6 4,997.6 10,896.3 362,964.8
1992 264,418.7 40,995.9 13,646.9 6,213.6 3,267.2 6,697.9 335,240.2
1997 263,985.1 38,805.3 11,766.4 5,083.2 2,460.9 4,682.8 326,783.7
Noncultivated cropland 1982 42,799.4 975.1 336.8 153.4 70.4 169.4 44,504.5
1987 41,809.3 1,029.9 362.4 174.5 82.4 215.8 43,674.3
1992 45,444.0 915.1 348.2 155.7 59.3 152.7 47,075.0
1997 48,310.1 1,130.5 377.2 134.2 77.3 184.9 50,214.2
Total cropland 1982 319,302.5 53,831.4 18,911.0 9,256.6 5,681.0 13,971.5 420,954.0
1987 315,734.2 49,279.0 16,873.7 8,560.1 5,080.0 11,112.1 406,639.1
1992 309,862.7 41,911.0 13,995.1 6,369.3 3,326.5 6,850.6 382,315.2
1997 312,295.2 39,935.8 12,143.6 5,217.4 2,538.2 4,867.7 376,997.9
CRP land 1982 ---- ---- ---- ---- ---- ---- ----
1987 12,012.2 947.4 321.1 180.6 102.2 237.6 13,801.1
1992 33,319.0 416.6 101.7 67.9 47.6 89.3 34,042.1
1997 32,331.6 210.2 61.0 27.0 38.3 27.9 32,696.0
Pastureland 1982 122,223.3 5,165.8 2,055.9 1,039.2 501.9 1,019.9 132,006.0
1987 119,370.4 4,744.1 1,743.4 873.9 455.7 926.9 128,114.4
1992 117,383.7 4,770.1 1,728.5 881.6 476.1 807.5 126,047.5
1997 112,667.4 4,335.7 1,467.2 618.7 309.5 593.4 119,991.9



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