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Phosphorus Runoff from Agricultural Land and Direct Fertilizer Effects

A Review

Murray R. Harta, Bert F. Quinb,* and M. Long Nguyenc

a School of Environment & Agriculture, University of Western Sydney (Hawkesbury Campus), Locked Bag 1797, Penrith South, DC NSW 1797, Australia [formerly Summit-Quinphos (NZ) Ltd]
b Summit-Quinphos (NZ) Ltd, PO Box 24-020, Auckland, New Zealand
c National Institute of Water & Atmospheric Research Ltd, PO Box 11-115, Hamilton, New Zealand



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  		Fig. 1. Mean dissolved inorganic phosphorus (DIP) concentration in surface runoff events before and after the addition of dicalcium phosphate (DCP) and single superphosphate (SSP) (redrawn from Sharpley et al., 1978).

 


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  		Fig. 2. Mean particulate phosphorus (PP) concentration in surface runoff events before and after the addition of dicalcium phosphate (DCP) and single superphosphate (SSP) (redrawn from Sharpley et al., 1978).

 


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  		Fig. 3. Relative crop yield and phosphorus loss in surface runoff in comparison with soil test categories for potential runoff loss (after McDowell et al., 2002).

 




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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 © 2004 by the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America.