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Published online 7 November 2005
Published in J Environ Qual 34:2301-2309 (2005)
DOI: 10.2134/jeq2004.0415
© 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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Freeze–Thaw Effects on Phosphorus Loss in Runoff from Manured and Catch-Cropped Soils

Marianne E. Bechmanna,*, Peter J. A. Kleinmanb, Andrew N. Sharpleyb and Lou S. Saporitob

a Norwegian Centre for Soil and Environmental Research, Jordforsk, Frederik A. Dahls vei 20, N-1432 Aas, Norway
b USDA-ARS, Pasture Systems and Watershed Management Research Unit, Curtin Road, University Park, PA16802-3702



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  		Fig. 1. Water-extractable P in annual ryegrass exposed to different number of freeze–thaw cycles (FTC). Repeated freezing (1 FTC/d); Continuous freezing (8 d).

 


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  		Fig. 2. The relationship between total P in runoff and suspended sediments in runoff before freezing of the catch-cropped, manured, and bare soil runoff boxes.

 




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