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Published online 2 February 2006
Published in J Environ Qual 35:542-547 (2006)
DOI: 10.2134/jeq2005.0214
© 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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Distribution of Phosphorus in Manure Slurry and Its Infiltration after Application to Soils

Peter A. Vadas*

USDA-Agricultural Research Service, Pasture Systems and Watershed Management Research Unit, Building 3702, Curtin Road, University Park, PA 16802-3702


Figure 1
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  		Fig. 1. Schematic of the suction-filtering apparatus used to separate slurry liquids and solids.

 

Figure 2
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  		Fig. 2. Fraction of original dairy and swine slurry (a) dry matter, (b) total phosphorus (TP), (c) water-extractable inorganic phosphorus (WEIP), and (d) water-extractable organic phosphorus (WEOP) in slurry solids left on the surface of soil columns both 24 and 96 h after slurry application. Different letters indicate significant differences at the 0.05 level between P in solids left on the soil surface.

 

Figure 3
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  		Fig. 3. Fraction of original dairy and swine slurry (a) dry matter, (b) total phosphorus (TP), (c) water-extractable inorganic phosphorus (WEIP), and (d) water-extractable organic phosphorus (WEOP) in slurry liquids and solids as separated by sieving, centrifuging, and suction-filtering. Different letters within slurry type only indicate significant differences between separation methods at the 0.05 level.

 




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