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Research ArticleA Section

Phosphorus removal structures: A management option for legacy phosphorus

Chad Penn, Joshua McGrath, James Bowen and Stuart Wilson
Journal of Soil and Water Conservation March 2014, 69 (2) 51A-56A; DOI: https://doi.org/10.2489/jswc.69.2.51A
Chad Penn
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Joshua McGrath
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James Bowen
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Stuart Wilson
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Phosphorus (P) loading is considered a primary contributor to surface water eutrophication (Daroub et al. 2009). Phosphorus moves from soil to surface water as dissolved or particulate P. Particulate P is typically not 100% bioavailable, having to enter solution (through dissolution or desorption) before being available for uptake. On the other hand, transported dissolved P is immediately 100% bioavailable to aquatic biota. In addition, dissolved P can be released over very long periods of time from high P source areas on the landscape even when practices are used to control particulate losses. Therefore, dissolved P is generally considered more problematic for water quality, both due to its immediate impact on the ecosystem and difficulties in controlling its movement.

The term “legacy P” is often used to refer to accumulated P that can serve as a long-term source of P to surface waters. Terrestrial P legacies result from past management decisions that lead to high soil P concentrations (Sharpley et al. 2013). Soil P dynamics are such that once soil P concentrations are elevated it can take many years for them to decrease below levels of environmental concern. These high-testing soils are able to release dissolved P for many years, even…

  • © 2014 by the Soil and Water Conservation Society
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Journal of Soil and Water Conservation: 69 (2)
Journal of Soil and Water Conservation
Vol. 69, Issue 2
March/April 2014
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Phosphorus removal structures: A management option for legacy phosphorus
Chad Penn, Joshua McGrath, James Bowen, Stuart Wilson
Journal of Soil and Water Conservation Mar 2014, 69 (2) 51A-56A; DOI: 10.2489/jswc.69.2.51A

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Phosphorus removal structures: A management option for legacy phosphorus
Chad Penn, Joshua McGrath, James Bowen, Stuart Wilson
Journal of Soil and Water Conservation Mar 2014, 69 (2) 51A-56A; DOI: 10.2489/jswc.69.2.51A
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