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Quantifying phosphorus losses from the agricultural system

J. L. Lemunyon and T. C. Daniel
Journal of Soil and Water Conservation November 2002, 57 (6) 399-401;
J. L. Lemunyon
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T. C. Daniel
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ABSTRACT:

Phosphorus is transferred from agricultural lands to water bodies dissolved in surface runoff, attached to eroded sediment, and leached through the soil profile. It is also removed from the agricultural system as a component of the harvested crop. While communicating with landowners and producers during the nutrient management planning process, it is important to emphasize the relative quantity of phosphorus losses via these mechanisms. This manuscript covers methods of assessing these losses. Field specific parameters such as runoff volume, erosion rate, soil test phosphorus, and crop phosphorus concentration need to be considered in relation to estimates of total P enrichment ratios, sediment delivery ratios, and soil sediment enrichment ratios. These estimates can be used to assess how best soil and water conservation practices and other techniques minimize off-site transport of phosphorus. These estimates of phosphorus field loss will contribute to a better understanding of nutrient application risks, wise land use decisions, and increased implementation of management practices.

Footnotes

  • Jerry L Lemunyon is an agronomist at the U.S. Department of Agriculture-Natural Resources Conservation Service (USDA-NRCS) in Fort Worth, Texas and Tommy C. Daniel is a professor in the Crop, Soil, and Environmental Science Department at the University of Arkansas in Fayetteville, Arkansas.

  • Copyright 2002 by the Soil and Water Conservation Society

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Journal of Soil and Water Conservation: 57 (6)
Journal of Soil and Water Conservation
Vol. 57, Issue 6
November/December 2002
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Quantifying phosphorus losses from the agricultural system
J. L. Lemunyon, T. C. Daniel
Journal of Soil and Water Conservation Nov 2002, 57 (6) 399-401;

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Quantifying phosphorus losses from the agricultural system
J. L. Lemunyon, T. C. Daniel
Journal of Soil and Water Conservation Nov 2002, 57 (6) 399-401;
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  • Nitrogen export from Coastal Plain field ditches
  • Phosphorus in agricultural ditch soil and potential implications for water quality
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