Movement of nitrogen‐15 labeled nitrate in large undisturbed columns of poorly drained soil

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• R. M. Vanden Heuvel, R. G. Hoeft, and R. L. Mulvaney are affiliated with the Department of Agronomy, University of Illinois, Urbana, Illinois 61801. B. R. Montgomery is associated with the Minnesota Department of Agriculture, St. Paul, Minnesota 55107.
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• This study was a part of Project No. ILLU‐16–53236, Illinois Agricultural Experiment Station. The research was supported in part by the Tennessee Valley Authority.
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