Reducing phosphorus runoff from dairy farms

Journal of Environmental Quality
Darrell J BoschKatharine F Knowlton

Abstract

Phosphorus (P) runoff from manure can lead to eutrophication of surface water and algae growth. This study evaluates the impacts of alternative P reduction practices on dairy farm net returns and on potential P runoff. The P control practices include dairy herd nutrient management, crop nutrient management, and runoff and erosion control. Four farms representative of dairies in the Virginia Shenandoah Valley are simulated including dairies with and without supplementary broiler enterprises and with average and below average land area. A mathematical programming model was developed to predict farm production and net returns and the GLEAMS model was used to predict potential P runoff. The farms are evaluated under four scenarios: Scenario 1, no constraint on P runoff with access to crop nutrient, runoff and erosion control strategies but no access to dairy herd nutrient control strategies; Scenario 2, no constraint on P runoff with access to all crop and dairy herd nutrient control strategies; Scenario 3, constraint on P runoff with access to crop nutrient, runoff and erosion control strategies but no access to dairy herd nutrient control strategies; and Scenario 4, constraint on P runoff with access to all crop and dairy herd nu...Continue Reading

References

Dec 1, 1992·Journal of Dairy Science·D E Bauman
Apr 1, 1984·Journal of Dairy Science·C C Stallings, M L McGilliard
May 1, 1995·Journal of Dairy Science·R A Erdman, M Varner
Jul 1, 1994·Journal of Dairy Science·H H Van HornR A Nordstedt
May 3, 2000·Journal of Dairy Science·G E DahlH A Tucker

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Citations

Jul 2, 2008·Proceedings of the National Academy of Sciences of the United States of America·Judith L CapperDale E Bauman
Dec 18, 2010·Bioresource Technology·Erik R CoatsRonald L Crawford
Jan 1, 2013·Annual Review of Animal Biosciences·Judith L Capper, Dale E Bauman

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