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Nutrient Input and Removal Trends for Agricultural Soils in Nine Geographic Regions in Arkansas

^a Department of Crop, Soil and Environmental Sciences, 115 Plant Science Building, Fayetteville, AR 72701
^b University of Arkansas Cooperative Extension Service, P.O. Box 351, Little Rock, AR 72204

View larger version (49K): [in a new window]   Fig. 1. Geographic boundaries for nine districts in Arkansas used to assess nutrient balances for N, P, and K.

View larger version (24K): [in a new window]   Fig. 2. Median Mehlich 3–extractable P concentrations of soils used for established warm- and cool-season grasses (a) and row-crop (b) production from 1995 to 2002 from University of Arkansas soil test data summaries (DeLong et al., 1996, 1997, 1998, 1999, 2000, 2001, 2002, and 2003).