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https://hdl.handle.net/2440/34290
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Type: | Journal article |
Title: | Phosphorus transfer in surface runoff from intensive pasture systems at various scales: a review |
Author: | Dougherty, W. Fleming, N. Cox, J. Chittleborough, D. |
Citation: | Journal of Environmental Quality, 2004; 33(6):1973-1988 |
Publisher: | Amer Soc Agronomy |
Issue Date: | 2004 |
ISSN: | 0047-2425 1537-2537 |
Statement of Responsibility: | Warwick J. Dougherty, Nigel K. Fleming, Jim W. Cox, and David J. Chittleborough |
Abstract: | Phosphorus transfer in runoff from intensive pasture systems has been extensively researched at a range of scales. However, integration of data from the range of scales has been limited. This paper presents a conceptual model of P transfer that incorporates landscape effects and reviews the research relating to P transfer at a range of scales in light of this model. The contribution of inorganic P sources to P transfer is relatively well understood, but the contribution of organic P to P transfer is still relatively poorly defined. Phosphorus transfer has been studied at laboratory, profile, plot, field, and watershed scales. The majority of research investigating the processes of P transfer (as distinct from merely quantifying P transfer) has been undertaken at the plot scale. However, there is a growing need to integrate data gathered at a range of scales so that more effective strategies to reduce P transfer can be identified. This has been hindered by the lack of a clear conceptual framework to describe differences in the processes of P transfer at the various scales. The interaction of hydrological (transport) factors with P source factors, and their relationship to scale, require further examination. Runoff-generating areas are highly variable, both temporally and spatially. Improvement in the understanding and identification of these areas will contribute to increased effectiveness of strategies aimed at reducing P transfers in runoff. A thorough consideration of scale effects using the conceptual model of P transfer outlined in this paper will facilitate the development of improved strategies for reducing P losses in runoff. |
Keywords: | Animals Animals, Domestic Plants, Edible Phosphorus Polymethyl Methacrylate Water Pollutants Water Movements Water Pollution Models, Theoretical Animal Husbandry |
Description: | © ASA, CSSA, SSSA |
DOI: | 10.2134/jeq2004.1973 |
Published version: | http://jeq.scijournals.org/cgi/content/abstract/33/6/1973 |
Appears in Collections: | Aurora harvest Earth and Environmental Sciences publications Environment Institute publications |
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