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Published online 27 October 2006
Published in J Environ Qual 35:2342-2351 (2006)
DOI: 10.2134/jeq2006.0105
© 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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Repeated Compost Application Effects on Phosphorus Runoff in the Virginia Piedmont

John T. Spargo*, Gregory K. Evanylo and Marcus M. Alley

Department of Crop and Soil Environmental Sciences, Smyth Hall, Virginia Tech, Blacksburg, VA 24061


Figure 1
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  		Fig. 1. Relationship between bulk density and total carbon in samples collected September 2004. Values are the average of four replications ± SE. CTL, control; CF, commercial fertilizer; PL, poultry litter; PLC, poultry litter-yard waste compost; BSC, biosolids compost.

 

Figure 2
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  		Fig. 2. Relationship between runoff and total soil carbon content. Values are the average of four replications ± SE. CTL, control; CF, commercial fertilizer; PL, poultry litter; PLC, poultry litter-yard waste compost; BSC, biosolids compost.

 

Figure 3
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  		Fig. 3. Relationship between water soluble P (WSP) or Mehlich-3 P (M3P) in the surface 5-cm layer of soil and dissolved reactive P (DRP) in runoff. Values are the average of four replications ± SE. CTL, control; CF, commercial fertilizer; PL, poultry litter; PLC, poultry litter-yard waste compost; BSC, biosolids compost.

 




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