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2. United States Department of Agriculture. 1997 Census of Agriculture. Available at www.nass.usda.gov/census/index1997.htm. Cited February 24, 2005.
3. United States Department of Agriculture. 2002 Census of Agriculture. Available at www.nass.usda.gov/census/. Cited February 24, 2005.
4. Harvest of hope;Garkovich,1995
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