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  1. 1
    Increasing Nitrogen Use Efficiency of Corn in Midwestern Cropping Systems

    Increasing Nitrogen Use Efficiency of Corn in Midwestern Cropping Systems by J.L. Hatfield, J.H. Prueger

    Published 2001-01-01
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  2. 2
    Nitrogen in the Environment: Sources, Problems, and Management

    Nitrogen in the Environment: Sources, Problems, and Management by R.F. Follett, J.L. Hatfield

    Published 2001-01-01
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