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Sources of Newly Developed Land that was Prime Farmland, by Region

Estimates presented here are based upon the latest information from the National Resources Inventory (NRI). The NRI is a longitudinal sample survey based upon scientific statistical principles and procedures. It is conducted by the U.S. Department of Agriculture’s Natural Resources Conservation Service (NRCS), in cooperation with Iowa State University’s Center for Survey Statistics and Methodology. These results are based upon the 2007 NRI, which provides nationally consistent data for the 25-year period 1982–2007. Estimates here cover the contiguous 48 states. Separate estimates include Hawaii, Alaska, and the Caribbean.

Margins of error are reported for each NRI estimate and must be considered at all scales of analysis. The margin of error is used to construct the 95 percent confidence interval for the estimate. The lower bound of the interval is obtained by subtracting the margin of error from the estimate; the upper bound is obtained by adding the margin of error to the estimate. A 95 percent confidence interval means that in repeated samples from the same population, 95 percent of the time the true underlying population parameter will be contained within the lower and upper bounds of the interval.

Table 35. Sources of Newly Developed Land that was Prime Farmland, by Farm Production Region, in Thousands of Acres, with Margins of Error
Region Year Cropland Pastureland Rangeland Forest Land All Other Total
Appalachian 1982 to 1987 147.7
±22.0
67.7
±14.8
0.0
--
111.3
±38.7
4.8
±3.1
331.5
±42.8
1987 to 1992 155.7
±22.6
85.5
±32.8
0.0
--
124.5
±22.3
3.8
±1.4
369.5
±46.9
1992 to 1997 192.8
±19.4
132.6
±35.0
0.0
--
159.5
±29.6
15.3
±7.2
500.2
±47.8
1997 to 2002 145.1
±31.6
88.0
±15.1
0.0
--
160.2
±35.5
11.3
±4.7
404.6
±50.4
2002 to 2007 108.4
±30.9
55.1
±15.0
0.0
--
100.9
±40.2
7.2
±3.1
271.6
±54.0
1982 to 2007 795.4
±71.1
415.8
±51.2
0.0
--
630.5
±102.8
38.1
±7.1
1,879.8
±157.3
Corn Belt 1982 to 1987 281.5
±41.0
39.9
±8.6
0.0
--
33.2
±11.9
6.2
±3.2
360.8
±46.4
1987 to 1992 243.6
±36.2
41.0
±12.4
0.0
--
43.3
±9.6
6.3
±3.7
334.2
±41.0
1992 to 1997 440.9
±41.5
58.5
±11.2
0.0
--
73.7
±16.2
30.0
±10.2
603.1
±53.0
1997 to 2002 255.6
±49.9
58.9
±20.8
0.0
--
43.5
±17.8
14.5
±7.0
372.5
±62.5
2002 to 2007 230.2
±45.3
49.5
±23.4
0.0
--
55.0
±16.6
8.5
±3.6
343.2
±66.1
1982 to 2007 1,493.6
±117.1
231.9
±48.6
0.0
--
235.4
±46.4
56.1
±14.8
2,017.0
±151.2
Delta States 1982 to 1987 63.7
±11.2
41.2
±10.7
0.0
--
54.6
±12.1
3.4
±2.8
162.9
±17.4
1987 to 1992 39.3
±7.8
44.2
±15.1
0.2
±0.4
49.8
±10.0
1.3
±0.8
134.8
±23.4
1992 to 1997 91.2
±21.1
76.8
±19.7
0.0
--
71.5
±14.1
5.9
±1.9
245.4
±31.4
1997 to 2002 50.5
±19.3
68.9
±21.1
0.0
--
112.9
±34.3
6.3
±4.4
238.6
±49.1
2002 to 2007 42.1
±17.4
48.4
±15.3
0.0
--
118.5
±34.6
5.3
±2.8
214.3
±43.9
1982 to 2007 327.5
±51.5
265.4
±45.5
0.2
±0.9
383.0
±65.5
19.9
±5.7
996.0
±91.5
Lake States 1982 to 1987 107.8
±23.0
16.4
±7.0
0.0
--
23.4
±7.6
2.1
±1.4
149.7
±24.9
1987 to 1992 123.0
±18.2
31.9
±10.0
0.0
--
24.6
±9.5
3.4
±1.8
182.9
±21.8
1992 to 1997 202.5
±27.3
31.4
±8.8
0.0
--
45.4
±14.3
9.2
±4.1
288.5
±33.0
1997 to 2002 129.1
±21.0
25.5
±9.3
0.0
--
30.7
±8.6
7.9
±5.4
193.2
±24.3
2002 to 2007 110.9
±24.3
13.9
±5.9
0.0
--
26.9
±10.5
6.1
±2.4
157.8
±24.7
1982 to 2007 695.8
±57.6
109.9
±23.3
0.0
--
146.1
±25.0
20.2
±5.6
972.0
±70.9
Mountain 1982 to 1987 99.0
±52.5
10.0
±11.7
0.6
±1.0
0.0
--
0.0
--
109.6
±54.5
1987 to 1992 60.3
±19.9
14.9
±11.1
0.2
±0.6
0.0
--
0.0
--
75.4
±25.1
1992 to 1997 66.0
±16.5
20.2
±8.3
0.0
--
0.1
±0.2
0.3
±0.3
86.6
±18.6
1997 to 2002 116.9
±64.4
16.9
±8.6
0.0
--
1.1
±2.7
0.1
±0.4
135.0
±64.2
2002 to 2007 63.2
±32.1
19.9
±22.7
0.2
±0.6
0.1
±0.5
0.3
±0.5
83.7
±37.5
1982 to 2007 436.1
±109.8
71.9
±56.3
1.0
±1.4
0.3
±1.1
1.4
±1.9
510.7
±114.7
Northeast 1982 to 1987 115.4
±20.8
28.0
±7.9
0.0
--
76.3
±15.1
3.8
±2.3
223.5
±25.0
1987 to 1992 126.0
±16.6
34.6
±8.3
0.0
--
81.9
±18.0
5.7
±3.3
248.2
±25.2
1992 to 1997 204.9
±24.9
61.1
±13.3
0.0
--
145.3
±13.8
16.2
±5.8
427.5
±32.1
1997 to 2002 132.8
±19.2
33.3
±10.7
0.0
--
116.3
±28.5
5.4
±3.5
287.8
±37.2
2002 to 2007 78.5
±15.4
26.5
±11.0
0.0
--
69.6
±18.1
4.2
±2.2
178.8
±25.1
1982 to 2007 679.8
±56.0
194.6
±31.3
0.0
--
467.4
±60.9
25.8
±6.9
1,367.6
±97.9
Northern Plains 1982 to 1987 23.7
±8.7
2.7
±2.1
1.6
±1.5
0.2
±0.4
0.3
±0.3
28.5
±10.5
1987 to 1992 78.0
±32.3
11.0
±5.6
8.8
±5.5
1.4
±1.6
4.0
±4.6
103.2
±36.6
1992 to 1997 66.2
±12.7
13.6
±5.6
9.5
±5.7
4.5
±2.5
2.6
±3.6
96.4
±16.0
1997 to 2002 55.1
±18.9
5.2
±4.0
4.7
±3.9
3.3
±5.4
2.9
±2.5
71.2
±22.9
2002 to 2007 49.7
±16.9
8.5
±9.3
4.8
±4.7
1.4
±2.0
2.5
±2.3
66.9
±22.9
1982 to 2007 281.3
±60.4
36.9
±13.4
30.9
±8.9
8.8
±6.3
8.8
±4.4
366.7
±70.8
Pacific 1982 to 1987 46.8
±18.9
16.8
±14.7
4.2
±6.8
6.7
±5.1
0.3
±0.4
74.8
±21.5
1987 to 1992 101.3
±28.0
20.5
±9.2
3.5
±4.3
11.6
±7.3
2.1
±1.5
139.0
±29.5
1992 to 1997 123.4
±23.4
28.4
±8.7
3.2
±3.5
11.4
±7.0
3.9
±1.9
170.3
±26.0
1997 to 2002 69.0
±23.4
34.6
±14.3
1.2
±2.2
12.3
±5.4
2.9
±2.5
120.0
±28.1
2002 to 2007 49.8
±18.0
22.6
±11.7
5.8
±6.6
9.7
±6.6
4.2
±2.9
92.1
±21.9
1982 to 2007 417.5
±53.6
118.4
±32.7
13.0
±8.8
49.1
±14.1
10.2
±4.7
608.2
±69.4
Southeast 1982 to 1987 77.6
±22.4
22.6
±10.4
0.0
--
65.1
±18.3
4.6
±1.8
169.9
±27.4
1987 to 1992 75.4
±16.9
43.9
±14.0
0.0
--
98.0
±15.0
7.4
±4.3
224.7
±21.3
1992 to 1997 128.4
±21.6
78.7
±15.3
0.0
--
158.9
±28.4
18.6
±5.9
384.6
±41.1
1997 to 2002 89.9
±26.9
79.1
±19.5
0.2
±114.2
145.5
±33.2
7.2
±4.8
321.9
±121.5
2002 to 2007 61.8
±19.9
58.1
±18.4
0.0
--
118.4
±26.1
6.7
±2.4
245.0
±37.2
1982 to 2007 519.0
±76.9
247.6
±61.0
0.2
±149.4
542.0
±74.9
40.6
±14.3
1,349.4
±143.4
Southern Plains 1982 to 1987 101.4
±29.5
49.6
±21.8
42.7
±18.0
12.2
±9.7
3.4
±1.8
209.3
±42.2
1987 to 1992 75.1
±24.9
70.4
±20.8
34.1
±12.2
14.6
±11.6
4.6
±2.9
198.8
±42.5
1992 to 1997 109.3
±27.5
105.2
±26.2
61.1
±18.5
20.4
±10.3
9.5
±3.6
305.5
±42.6
1997 to 2002 95.3
±27.9
141.8
±60.4
111.0
±37.7
55.5
±47.4
6.7
±2.0
410.3
±82.6
2002 to 2007 110.5
±32.3
135.6
±99.5
76.9
±23.3
49.9
±36.6
9.6
±3.1
382.5
±101.9
1982 to 2007 586.1
±89.7
450.9
±137.2
295.9
±53.5
146.4
±77.3
27.1
±6.4
1,506.4
±185.0
Notes:
• Cropland includes cultivated and non-cultivated cropland.
• All Other includes other rural land and Conservation Reserve Program (CRP) Land. CRP was not implemented until 1985.
• Instances where the margin of error is greater than or equal to the estimate are displayed in italics indicating that the confidence interval includes zero and that the estimate should not be used.
• When the estimate is 0.0, margins of error are not applicable and shown as a dashed line (--).

 

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