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Title: FGD gypsum application: Impacts on soil P from city parks in the Tampa area

item Torbert, Henry - Allen
item Watts, Dexter

Submitted to: American Society of Agronomy Meetings
Publication Type: Abstract Only
Publication Acceptance Date: 11/2/2014
Publication Date: 11/2/2014
Citation: Torbert III, H.A., Watts, D.B. 2014. FGD gypsum application: Impacts on soil P from city parks in the Tampa area [abstract]. American Society of Agronomy Meetings. CDROM.

Interpretive Summary:

Technical Abstract: Controlling excessive P loss from agricultural fields has become a major issue in recent years. However, managed city parks may also contribute to P loss. Thus, a study was conducted at three different city parks located in the Tampa Area to evaluate the use of FGD gypsum as an amendment to reduce water soluble P concentrations in soil. Two locations were moderately managed along walking trails and one location was intensively managed at a tennis complex. At the intensively managed location we evaluated plots from an irrigated and a natural rainfed site. The FGD gypsum was applied in May 2011 and sampled for water soluble P concentrations one year later at the 0-5 and 5-10 cm depth increments. The greatest impact of FGD gypsum on reducing water soluble P concentrations was observed at the 0-5 cm depth increment. Regardless of the management FGD gypsum reduced water soluble P concentrations in soil. This study shows that FGD gypsum could be used a binding agent to reduce the potential for water soluble P loss to surface water runoff.