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Published online 3 January 2006
Published in J Environ Qual 35:207-215 (2006)
DOI: 10.2134/jeq2005.0172
© 2006 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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Phosphorus Sequestration by Chemical Amendments to Reduce Leaching from Wastewater Applications

Francis Zvomuyaa, Carl J. Rosenb,* and Satish C. Gupta

a Lethbridge Research Centre, Agriculture and Agri-Food Canada, 5403 - 1 Avenue S., Lethbridge, AB, Canada T1J 4B1
b Department of Soil, Water, and Climate, University of Minnesota, 1991 Upper Buford Circle, Room 439, St. Paul, MN 55108-6028



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  		Fig.1. (a) Water-extractable phosphorus (WEP) and (b) Bray-1 P concentration after a 63-d laboratory incubation of amended soils at field moisture capacity and 25°C. Vertical bars represent standard errors.

 


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  		Fig. 2. (a) Electrical conductivity (EC) and (b) pH after a 63-d laboratory incubation of amended soils at field moisture capacity and 25°C. Vertical bars represent standard errors.

 


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  		Fig. 3. Breakthrough curves for relative Br concentration (C/C0) in leachate collected from the 1.5-m depth before alum application in the lysimeter microplots.

 


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  		Fig. 4. Changes in leachate total P concentration determined using 1.5-m-deep drainage lysimeters following potato-processing wastewater application in the microplots (a) before alum application and (b) after alum application.

 


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  		Fig. 5. Changes in leachate soluble reactive phosphorus (SRP) concentration determined using 1.5-m-deep drainage lysimeters following potato-processing wastewater application in the microplots (a) before alum application and (b) after alum application.

 




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