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Net Change in Prime Farmland, by Land Cover/Use, by Region and Year

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 34. Net Change in Prime Farmland, by Land Cover/Use, by Farm Production Region and Year, in Thousands of Acres, with Margins of Error
Region Year Cropland Pastureland Rangeland Forest Land All Other Total
Appalachian 1982 to 1987 -723.0
±103.9
149.1
±91.9
0.0
--
14.7
±67.3
203.9
±38.5
-355.3
±47.2
1987 to 1992 -742.0
±88.4
-3.1
±86.2
0.0
--
-69.2
±52.2
390.0
±61.7
-424.3
±48.1
1992 to 1997 -324.8
±135.0
-117.8
±126.0
0.0
--
-38.6
±77.6
-47.0
±38.2
-528.2
±48.2
1997 to 2002 -225.4
±178.5
-90.6
±162.7
0.0
--
-33.1
±88.3
-107.4
±56.4
-456.5
±54.7
2002 to 2007 -578.3
±208.5
248.7
±185.6
0.0
--
2.1
±62.0
51.1
±60.0
-276.4
±54.7
1982 to 2007 -2,593.5
±323.4
186.3
±364.8
0.0
--
-124.1
±310.0
490.6
±184.2
-2,040.7
±158.7
Corn Belt 1982 to 1987 -387.8
±145.8
-620.7
±140.8
-27.2
±19.2
79.8
±54.2
599.1
±71.7
-356.8
±51.0
1987 to 1992 -1,487.0
±116.8
-162.5
±84.2
0.0
--
55.7
±44.1
1,239.8
±77.9
-354.0
±46.9
1992 to 1997 -56.6
±154.5
-561.7
±104.5
-0.5
±4.6
105.2
±51.7
-144.3
±84.1
-657.9
±60.4
1997 to 2002 -400.1
±228.0
198.1
±246.7
0.0
--
149.0
±86.5
-405.8
±86.7
-458.8
±69.6
2002 to 2007 -560.0
±278.7
116.4
±254.6
5.4
±152.4
52.0
±104.3
-10.0
±111.1
-396.2
±71.9
1982 to 2007 -2,891.5
±467.8
-1,030.4
±448.8
-22.3
±249.7
441.7
±312.9
1,278.8
±248.7
-2,223.7
±188.4
Delta States 1982 to 1987 -694.2
±133.0
104.0
±114.3
0.9
±0.3
18.6
±94.9
299.0
±43.2
-271.7
±26.9
1987 to 1992 -880.4
±126.6
84.3
±89.1
1.2
±25.9
150.2
±60.6
407.2
±58.5
-237.5
±30.0
1992 to 1997 -571.0
±84.0
-67.6
±73.9
3.6
±5.6
277.3
±88.9
66.9
±47.0
-290.8
±42.5
1997 to 2002 -540.2
±142.3
-276.5
±167.7
-0.2
±0.8
445.3
±138.1
71.2
±57.1
-300.4
±51.6
2002 to 2007 -413.1
±163.4
-31.8
±190.3
-0.2
±0.6
152.7
±204.9
42.6
±74.6
-249.8
±51.1
1982 to 2007 -3,098.9
±406.5
-187.6
±342.3
5.3
±6.2
1,044.1
±374.5
886.9
±155.9
-1,350.2
±103.7
Lake States 1982 to 1987 -420.1
±135.4
-178.5
±103.7
0.0
--
-34.7
±47.7
448.8
±64.0
-184.5
±46.1
1987 to 1992 -680.0
±125.8
-184.3
±96.1
0.0
--
7.3
±47.7
664.9
±75.4
-192.1
±34.9
1992 to 1997 -428.8
±120.8
46.7
±112.8
0.0
--
103.5
±51.6
-14.9
±64.0
-293.5
±35.0
1997 to 2002 -450.7
±216.2
272.3
±199.8
0.0
--
121.1
±45.8
-144.6
±90.9
-201.9
±35.6
2002 to 2007 -492.6
±201.8
310.6
±193.0
0.0
--
6.5
±54.4
1.2
±67.3
-174.3
±33.0
1982 to 2007 -2,472.2
±468.7
266.8
±457.9
0.0
--
203.7
±154.2
955.4
±242.1
-1,046.3
±93.7
Mountain 1982 to 1987 -193.8
±104.0
-5.9
±37.4
-8.0
±8.6
1.3
±0.6
68.0
±29.9
-138.4
±83.5
1987 to 1992 -247.6
±133.9
7.6
±49.5
2.6
±7.0
1.2
±0.0
55.1
±30.5
-181.1
±112.1
1992 to 1997 -163.6
±84.0
-15.2
±63.6
6.4
±9.5
-0.4
±0.5
2.1
±11.4
-170.7
±35.4
1997 to 2002 -430.5
±175.6
-4.8
±147.8
10.7
±10.6
-1.1
±2.7
89.1
±44.5
-336.6
±126.5
2002 to 2007 -217.9
±139.2
-10.1
±57.3
58.8
±104.7
-0.1
±0.5
13.8
±19.8
-155.5
±94.7
1982 to 2007 -1,253.4
±321.5
-28.4
±123.7
70.5
±116.8
0.9
±4.2
228.1
±101.3
-982.3
±257.7
Northeast 1982 to 1987 -89.5
±66.1
-211.1
±61.7
0.0
--
8.5
±33.0
62.4
±29.9
-229.7
±25.3
1987 to 1992 -220.2
±58.2
-111.3
±60.9
0.0
--
20.7
±41.9
61.7
±40.0
-249.1
±26.7
1992 to 1997 -227.9
±61.1
-229.2
±64.0
0.0
--
32.3
±64.1
-35.8
±46.5
-460.6
±33.0
1997 to 2002 -356.8
±77.7
99.8
±73.6
0.0
--
-77.3
±42.0
34.4
±42.5
-299.9
±37.4
2002 to 2007 -270.3
±108.9
83.1
±120.1
0.0
--
-36.5
±24.5
37.0
±46.5
-186.7
±37.8
1982 to 2007 -1,164.7
±243.9
-368.7
±232.3
0.0
--
-52.3
±160.6
159.7
±65.1
-1,426.0
±115.9
Northern Plains 1982 to 1987 -63.1
±136.6
-139.0
±79.3
-260.1
±51.4
-0.4
±6.5
435.3
±68.3
-27.3
±31.7
1987 to 1992 -1,654.0
±158.5
76.2
±71.3
-218.3
±60.0
15.0
±20.2
1,604.6
±105.4
-176.5
±56.0
1992 to 1997 55.0
±82.0
-67.5
±63.1
-44.4
±32.9
4.8
±14.2
-13.4
±52.2
-65.5
±36.8
1997 to 2002 -505.2
±255.9
74.3
±129.1
120.2
±128.9
9.8
±31.7
231.2
±224.1
-69.7
±74.3
2002 to 2007 -443.4
±257.7
191.8
±169.6
-55.8
±149.1
-4.7
±4.8
200.4
±136.8
-111.7
±46.9
1982 to 2007 -2,610.7
±650.5
135.8
±339.4
-458.4
±430.9
24.5
±75.8
2,458.1
±367.5
-450.7
±225.1
Pacific 1982 to 1987 -230.4
±86.5
-4.1
±54.4
-8.9
±12.6
7.7
±15.0
156.0
±59.3
-79.7
±48.7
1987 to 1992 -440.8
±215.6
-19.3
±83.2
1.6
±13.7
-18.2
±14.1
104.3
±47.4
-372.4
±193.3
1992 to 1997 -197.5
±91.1
-55.5
±67.5
1.7
±14.8
-19.6
±11.0
20.1
±22.9
-250.8
±53.7
1997 to 2002 -260.7
±408.9
-165.8
±75.3
61.1
±55.1
16.9
±34.4
114.0
±63.0
-234.5
±385.5
2002 to 2007 37.8
±450.2
-53.3
±93.2
-2.1
±9.5
1.0
±13.3
-0.8
±10.7
-17.4
±443.4
1982 to 2007 -1,091.6
±545.3
-298.0
±224.3
53.4
±81.7
-12.2
±41.5
393.6
±153.4
-954.8
±480.3
Southeast 1982 to 1987 -794.7
±116.4
20.7
±91.8
0.0
--
189.6
±74.0
395.1
±78.9
-189.3
±31.4
1987 to 1992 -1,123.4
±119.5
209.4
±68.8
0.0
--
121.7
±55.6
547.3
±80.4
-245.0
±25.4
1992 to 1997 -628.4
±133.7
-99.8
±94.8
0.0
--
316.0
±75.6
-17.5
±85.1
-429.7
±48.5
1997 to 2002 -513.0
±146.7
-62.6
±160.9
-0.2
±114.2
535.3
±110.9
-324.1
±87.9
-364.6
±122.1
2002 to 2007 -568.6
±225.0
153.2
±188.9
0.0
--
174.5
±236.1
-15.0
±64.6
-255.9
±38.7
1982 to 2007 -3,628.1
±390.6
220.9
±370.8
-0.2
±149.4
1,337.1
±399.3
585.8
±226.4
-1,484.5
±146.0
Southern Plains 1982 to 1987 -1,142.3
±151.8
367.4
±149.8
-395.6
±91.7
128.6
±52.4
780.2
±107.1
-261.7
±59.3
1987 to 1992 -1,837.1
±194.6
239.7
±117.1
-178.8
±85.2
85.3
±42.7
1,446.0
±139.8
-244.9
±60.6
1992 to 1997 -865.6
±154.4
-12.4
±193.0
420.4
±137.7
229.2
±78.2
-135.6
±78.7
-364.0
±57.2
1997 to 2002 -1,066.4
±250.7
370.8
±199.8
211.6
±158.9
24.7
±91.1
-20.1
±167.7
-479.4
±97.3
2002 to 2007 -1,236.2
±322.2
361.2
±405.1
386.4
±230.1
-32.1
±122.8
56.5
±68.7
-464.2
±312.1
1982 to 2007 -6,147.6
±730.2
1,326.7
±625.4
444.0
±641.9
435.7
±409.5
2,127.0
±384.6
-1,814.2
±306.9
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.
• When the estimate is 0.0, margins of error are not applicable and shown as a dashed line (--).
• 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.

 

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