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THE PHOSPHORUS INDEX: BACKGROUND AND STATUS

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  Pp. 469-482 in Animal Agriculture and the Environment: National Center for Manure and Animal Waste Management White Papers. J. M. Rice, D. F. Caldwell, F. J. Humenik, eds. 2006. St. Joseph, Michigan: ASABE.  .(doi:10.13031/2013.20262)
Authors:   T. C. Daniel, W. E. Jokela, P. A. Moore, Jr., A. N. Sharpley, W. J. Gburek

Resource managers are struggling with developing and implementing equitable programs that will minimize phosphorus (P) loss to our nations waters. One of the most promising management tools for accomplishing this difficult task is the P Index (Lemunyon and Gilbert, 1993), a tool designed for use by resource managers to assess and rank fields as to their relative P loss potential. While the intent and fundamental framework of the P Index remains the same, many versions of the P Index exist and are in varying stages of evolution due to differing regional and geographic conditions. The purpose of this document is to provide a brief review and update of the present status of the P Index, using examples where possible, to demonstrate the evolving nature of this complex process.

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