Redox and Soil Manipulation Effects on Ditch Soil Phosphorus Processing

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dc.contributor.advisorNeedelman, Brian Aen_US
dc.contributor.authorRuppert, David Emmanuelen_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.accessioned2012-10-10T11:32:29Z
dc.date.available2012-10-10T11:32:29Z
dc.date.issued2012en_US
dc.description.abstractDitches increase the connectivity of landscapes to open water systems, potentially facilitating the degradation of downstream waterways. A treatment and an observational experiment were conducted to identify processes behind phosphorus (P) cycling in ditch soils. If the ditch had not undergone recent dredging soils were observed in the treatment experiment to release P to surface water whether the soil system was iron (Fe)-oxidizing or Fe-reducing. Also in the treatment experiment, Fe was released to surface water in appreciable amounts only if the soil system was Fe-reducing. From the observational experiment P release due to mineralization was inferred due to a positive trend with temperature. Also in the observational experiment Fe-reducing conditions were weakly correlated with diminished P concentrations in the ditch water. It was inferred that emergent Fe(II) released from within the soil through reductive dissolution captures P from ditch surface water upon oxidation. In the treatment experiment dredging and saturated conditions resulted in similar effluent P concentrations as drained soils that were undredged. This may explain a lack of dredging effect that was observed in the field.en_US
dc.identifier.urihttp://hdl.handle.net/1903/13071
dc.subject.pqcontrolledSoil sciencesen_US
dc.subject.pqcontrolledEnvironmental scienceen_US
dc.subject.pqcontrolledBiogeochemistryen_US
dc.subject.pquncontrolledDitchen_US
dc.subject.pquncontrolledDredgingen_US
dc.subject.pquncontrolledIronen_US
dc.subject.pquncontrolledPhosphorusen_US
dc.subject.pquncontrolledRedoxen_US
dc.subject.pquncontrolledSoilen_US
dc.titleRedox and Soil Manipulation Effects on Ditch Soil Phosphorus Processingen_US
dc.typeDissertationen_US

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