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Summary Report, 1997 NRI, Revised December 2000 - Table 13

Table 13 - Estimated average annual wind 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 Wind erosion Total
≤ T > T ≤ 2T > 2T ≤ 3T > 3T ≤ 4T > 4T ≤ 5T > 5T
Cultivated Cropland 1982 298,787.1 34,740.2 17,867.0 8,962.4 4,744.8 11,348.0 376,449.5
1987 286,272.3 35,395.8 16,937.9 8,930.5 4,973.5 10,454.8 362,964.8
1992 282,586.3 25,118.4 11,168.7 5,916.7 3,152.9 7,297.2 335,240.2
1997 279,458.3 22,690.8 10,150.7 5,430.0 2,912.8 6,141.1 326,783.7
Noncultivated Cropland 1982 43,741.8 337.2 153.9 73.0 49.2 149.4 44,504.5
1987 42,736.1 405.1 207.7 111.3 62.1 152.0 43,674.3
1992 46,422.2 349.6 113.9 44.0 43.3 102.0 47,075.0
1997 49,708.2 234.5 118.8 41.7 27.6 83.4 50,214.2
Total cropland 1982 342,528.9 35,077.4 18,020.9 9,035.4 4,794.0 11,497.4 420,954.0
1987 329,008.4 35,800.9 17,145.6 9,041.8 5,035.6 10,606.8 406,639.1
1992 329,008.5 25,468.0 11,282.6 5,960.7 3,196.2 7,399.2 382,315.2
1997 329,166.5 22,925.3 10,269.5 5,471.7 2,940.4 6,224.5 376,997.9
CRP land 1982 ---- ---- ---- ---- ---- ---- ----
1987 9,342.5 1,326.3 939.9 487.0 458.7 1,246.7 13,801.1
1992 32,773.3 737.0 184.0 96.8 53.9 197.1 34,042.1
1997 32,274.9 230.1 53.5 20.2 28.8 88.5 32,696.0
Pastureland 1982 131,332.9 294.1 152.7 54.3 31.9 140.1 132,006.0
1987 127,453.0 275.6 150.1 53.1 55.8 126.8 128,114.4
1992 125,477.9 286.6 86.0 65.3 26.7 105.0 126,047.5
1997 119,524.3 222.9 95.5 39.4 25.0 84.8 119,991.9



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