Utilization of Gypsum as a Filter Material in Agricultural Drainage Ditches: Impacts of Land Application on Soil Fertililty Conditions

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dc.contributor.advisorMcGrath, Joshua M.en_US
dc.contributor.authorGrubb, Karen Lynen_US
dc.contributor.departmentPlant Science and Landscape Architecture (PSLA)en_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.date.accessioned2010-10-07T05:44:38Z
dc.date.available2010-10-07T05:44:38Z
dc.date.issued2010en_US
dc.description.abstractAgricultural drainage ditches can provide a direct connection between fields and surface waters, and some have been shown to deliver high loads of phosphorus (P) to sensitive water bodies. A potential way to reduce nutrient loads in drainage ditches is to install filter structures containing P sorbing materials (PSMs) including gypsum to remove P from ditch flow. One projected advantage would be the potential application of spent PSMs to agricultural fields to provide nutrients for crop production after the filter has lost its effectiveness. The study evaluated the feasibility of this strategy. Gypsum was saturated at two levels on mass basis of P, and applied to two soil types, a silt loam and a sandy loam and applied at both a high and low rate. The treated soils were incubated at 25° C, and samples were collected at 0, 1, 7, 28, 63, 91, 119, and 183 days after saturation.en_US
dc.identifier.urihttp://hdl.handle.net/1903/10821
dc.subject.pqcontrolledEnvironmental Sciencesen_US
dc.subject.pqcontrolledAgriculture, Soil Scienceen_US
dc.subject.pquncontrolledagricultural drainageen_US
dc.subject.pquncontrolledgypsumen_US
dc.subject.pquncontrolledphosphorusen_US
dc.subject.pquncontrolledphosphorus sorbing materials (PSMs)en_US
dc.subject.pquncontrolledsoil incubationen_US
dc.titleUtilization of Gypsum as a Filter Material in Agricultural Drainage Ditches: Impacts of Land Application on Soil Fertililty Conditionsen_US
dc.typeThesisen_US

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