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Published online 20 April 2005
Published in J Environ Qual 34:761-773 (2005)
DOI: 10.2134/jeq2002.0529
© 2005 American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Planned versus Actual Outcomes As a Result of Animal Feeding Operation Decisions for Managing Phosphorus

Perry E. Cabota and Pete Nowakb,*

a Department of Biological Systems Engineering and Nelson Institute for Environmental Studies, University of Wisconsin-Madison, 420 Agriculture Hall, 1450 Linden Drive, Madison, WI 53706
b Department of Rural Sociology and Nelson Institute for Environmental Studies, University of Wisconsin-Madison, 420 Agriculture Hall, 1450 Linden Drive, Madison, WI 53706



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  		Fig. 1. Point and nonpoint-source pathways of P delivery. (1) Direct discharge from the barn to waterbody. (2) Direct and concentrated runoff from barnyard to waterbody. (3) Indirect and diffuse discharge from cropland to waterbody mediated by farmer or operator.

 


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  		Fig. 2. Error plots of mean (a) soil test phosphorus (STP) levels and (b) phosphorus index (PI) ratings on 210 fields managed by nine animal feeding operations (AFOs) in south-central Wisconsin.

 


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  		Fig. 3. Cumulative distribution functions, S(x), of soil test phosphorus (STP) levels for 210 fields managed by nine animal feeding operations (AFOs) in south-central Wisconsin.

 


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  		Fig. 4. Cumulative distribution functions, S(x), of phosphorus index (PI) ratings for 210 fields managed by nine animal feeding operations (AFOs) in south-central Wisconsin.

 




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Copyright © 2005 by the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America.