Title:
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Cropping strategies for efficient use of water and nitrogen : proceedings of a symposium sponsored by Divisions S-4, S-5, S-8, C-3 and A-6 of the Soil Science Society of America, Crop Science Society of America, and the American Society of Agronomy in Atlanta, GA, 30 Nov. and 1 Dec. 1987 / editor, W.L. Hargrove.
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