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Published online 8 September 2005
Published in J Environ Qual 34:1820-1827 (2005)
DOI: 10.2134/jeq2004.0479
© 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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An Alum-Based Water Treatment Residual Can Reduce Extractable Phosphorus Concentrations in Three Phosphorus-Enriched Coastal Plain Soils

J. M. Novak* and D. W. Watts

USDA-ARS-Coastal Plains Soil, Water and Plant Research Center, 2611 West Lucas Street, Florence, SC 29501



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  		Fig. 1. Linear regression relationship between reductions in soil Mehlich-3 phosphorus (M3P) and water-soluble phosphorus (WSP) concentrations and percent water treatment residuals (WTR) incorporation. Mean values with a different letter are significantly different at P < 0.05.

 


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  		Fig. 2. Linear regression relationship between reductions in Mehlich-3 phosphorus (M3P) concentration in Soil 1 and percent water treatment residuals (WTR) (0–15% WTR) incorporation. The horizontal line represents proposed maximum soil Mehlich-3 phosphorus (M3P) concentration threshold.

 


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  		Fig. 3. Mean pH values in unamended and amended soils. Bars with a different letter are significantly different at P < 0.05 within each soil.

 


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  		Fig. 4. Mean electrical conductivity (EC) values in unamended and amended soils. Bars with a different letter are significantly different at P < 0.05 within each soil.

 




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The SCI Journals Agronomy Journal Crop Science
Journal of Natural Resources
and Life Sciences Education		 Vadose Zone Journal
Soil Science Society of America Journal Journal of Plant Registrations The Plant Genome
Copyright © 2005 by the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America.