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Article: Field-scale variation of soil phosphorus within small Alberta watersheds.(Report)
- Article from:
- Journal of Soil and Water Conservation
- Article date:
- November 1, 2007
- Author:
CopyrightCOPYRIGHT 2007 Soil & Water Conservation Society. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Phosphorus (P) is a limiting nutrient for the growth of plants and animals and is often supplemented in feeds and applied as fertilizers to cropland. Over-applications of P in excess of growth requirements have resulted in accumulations of P in the soils of some agricultural regions. The excess P can move into surface water bodies via runoff, resulting in the eutrophication of receiving fresh waters (Carpenter et al. 1998). The susceptibility of an agricultural landscape to P loss by runoff needs to be determined, particularly at field, hillslope and catchment scales (Haygarth et al. 2005).
The small proportion of added P that is available for uptake by crops is ...