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EPIC Tile Flow and Nitrate Loss Predictions for Three Minnesota Cropping Systems

S.W. Chunga, P.W. Gassmanb, D.R. Hugginsc and G.W. Randalld

a Civil Eng., Korean Water Resources Corp., Taejon, South Korea
b Center for Agric. and Rural Dev., Dep. of Economics, Iowa State Univ., Ames, IA, 50011
c USDA-ARS, 233 Johnson Hall, Washington State Univ., Pullman, WA 99164
d Univ. of Minnesota, Southern Research and Outreach Station, Waseca, MN 56093



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  		Fig. 1. Observed and Case I simulated monthly tile flows during 1990–1993 at Lamberton, MN, for (a) continuous corn (CC), (b) corn–soybean (CS), and (c) continuous alfalfa (CA); and (d) monthly precipitation.

 


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  		Fig. 2. Observed and Case I simulated monthly NO3–N losses during 1990–1993 at Lamberton, MN, for (a) continuous corn (CC), (b) corn–soybean (CS), and (c) continuous alfalfa (CA).

 


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  		Fig. 3. Observed and Case II simulated monthly tile flows during 1990–1993 at Lamberton, MN, for (a) continuous corn (CC) and (b) corn–soybean (CS), and (c) monthly precipitation.

 


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  		Fig. 4. Observed and Case II simulated monthly NO3–N losses during 1990–1993 at Lamberton, MN, for (a) continuous corn (CC) and (b) corn–soybean (CS).

 




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The SCI Journals Agronomy Journal Crop Science
Vadose Zone Journal Journal of Plant Registrations
Journal of Natural Resources
and Life Sciences Education		 Soil Science Society of America Journal
Copyright © 2001 by the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America.