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Annual Sheet and Rill Erosion in Relation to T Value on Nonfederal Rural Land

Estimated Average by Land Cover/Use and Year, 1,000 of acres

Land Cover/Use
Year
 Equal
0
>0<=T
>T<=2T
>2T<=3T
>3T<=4T
>4T<=5T
>5T
Total
Cropland cultivated
1982
0.0
1638.0
1319.1
545.9
265.2
173.8
286.2
4228.2
 
Error
(0.0)
(57.9)
(66.7)
(33.5)
(21.2)
(22.3)
(21.5)
(97.2)
 
1987
0.0
1727.5
1022.5
431.3
211.1
110.1
176.4
3678.9
 
Error
(0.0)
(66.6)
(48.0)
(28.4)
(23.0)
(12.2)
(19.1)
(89.3)
 
1992
0.0
1176.8
869.6
351.2
172.1
91.9
142.3
2803.9
 
Error
(0.0)
(52.1)
(44.8)
(27.8)
(15.2)
(13.0)
(14.6)
(78.1)
 
1997
0.0
1100.7
835.9
288.4
160.4
74.0
123.2
2582.6
 
Error
(0.0)
(50.7)
(42.0)
(22.0)
(15.3)
(11.6)
(13.5)
(75.4)
Cropland noncultivated
1982
0.0
265.0
8.0
7.1
1.4
0.0
1.1
282.6
 
Error
(0.0)
(24.9)
(3.9)
(4.3)
(1.4)
(0.0)
(1.1)
(26.0)
 
1987
0.0
308.1
9.2
0.0
0.0
0.0
0.0
317.3
 
Error
(0.0)
(24.9)
(3.7)
(0.0)
(0.0)
(0.0)
(0.0)
(25.1)
 
1992
0.0
336.0
4.7
0.0
1.2
1.2
0.0
343.1
 
Error
(0.0)
(26.9)
(3.0)
(0.0)
(1.2)
(1.2)
(0.0)
(27.3)
 
1997
0.0
331.5
4.1
0.0
0.0
1.2
0.0
336.8
 
Error
(0.0)
(28.2)
(2.9)
(0.0)
(0.0)
(1.2)
(0.0)
(28.5)
Conservation Reserve Program
1982
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
 
Error
(0.0)
(0.0)
(0.0)
(0.0)
(0.0)
(0.0)
(0.0)
(0.0)
 
1987
0.0
142.5
32.2
12.7
10.2
10.2
0.0
207.8
 
Error
(0.0)
(34.1)
(10.8)
(6.5)
(0.0)
(10.2)
(0.0)
(6.6)
 
1992
0.9
497.3
28.4
0.0
0.0
8.0
0.0
534.6
 
Error
(0.9)
(0.9)
(6.0)
(0.0)
(0.0)
(8.0)
(0.0)
(0.2)
 
1997
0.0
471.0
27.1
6.8
3.5
8.0
5.5
521.9
 
Error
(0.0)
(11.9)
(5.9)
(6.8)
(3.5)
(8.0)
(5.5)
(5.2)
Pastureland
1982
0.0
3630.0
78.2
20.6
4.4
0.0
14.6
3747.8
 
Error
(0.0)
(101.0)
(14.8)
(6.5)
(2.5)
(0.0)
(9.8)
(100.5)
 
1987
0.0
3492.4
56.5
21.8
3.0
2.6
1.1
3577.4
 
Error
(0.0)
(95.1)
(11.9)
(7.7)
(2.1)
(1.8)
(1.1)
(96.2)
 
1992
0.0
3679.8
53.7
20.1
1.4
3.6
11.9
3770.5
 
Error
(0.0)
(91.2)
(9.8)
(6.2)
(1.4)
(2.5)
(5.1)
(92.0)
 
1997
0.0
3423.8
67.1
29.1
0.0
0.0
6.6
3526.6
 
Error
(0.0)
(85.7)
(11.2)
(7.7)
(0.0)
(0.0)
(4.4)
(88.2)
Total
1982
0.0
5533.0
1405.3
573.6
271.0
173.8
301.9
8258.6
 
Error
(0.0)
(112.3)
(72.2)
(33.9)
(21.3)
(22.3)
(24.2)
(121.4)
 
1987
0.0
5670.5
1120.4
465.8
224.3
122.9
177.5
7781.4
 
Error
(0.0)
(122.2)
(52.9)
(32.1)
(23.0)
(17.0)
(19.3)
(114.7)
 
1992
0.9
5689.9
956.4
371.3
174.7
104.7
154.2
7452.1
 
Error
(0.9)
(103.2)
(45.9)
(28.5)
(15.3)
(15.5)
(15.4)
(112.3)
 
1997
0.0
5327.0
934.2
324.3
163.9
83.2
135.3
6967.9
 
Error
(0.0)
(96.8)
(44.7)
(24.0)
(15.7)
(14.1)
(15.2)
(107.1)
 

NOTES: Total estimates may be adjusted to account for rounding. The error referred to in the table is the standard error of the estimate. You can obtain the margin of error at the 95% confidence limit by multiplying the error by 1.96.



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