Evaluating Soil Phosphorus Dynamics over Time

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dc.contributor.advisorCoale, Frank Jen_US
dc.contributor.authorLucas, Emileigh Rossoen_US
dc.contributor.departmentEnvironmental Science and Technologyen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.date.accessioned2017-09-13T05:32:28Z
dc.date.available2017-09-13T05:32:28Z
dc.date.issued2017en_US
dc.description.abstractAgricultural nutrient management became mandatory in Maryland (MD) due to water quality concerns. Phosphorus (P) management is complex due to the stability of P in the soil, nutrient mass imbalance, and “legacy” P. To explore how potential P application bans impact historically manured fields, agronomic and environmental soil tests were conducted on plots treated with five manure-P rates, then no P applications, spanning 15 years. Mehlich-3 extractable P (M3P) declined slowly and then generally did not change during the last six years. Phosphorus saturation declined slowly or not significantly. Excessive P soils had sufficient P for crop growth in solution. Phosphorus saturation and M3P were compared in fifty sites across MD pre- and post- nutrient management planning. Results showed an increase in P concentration of Maryland agricultural fields. This response was logical, as better management would increase below-optimum P concentrations, and the regulations were not designed to draw down P.en_US
dc.identifierhttps://doi.org/10.13016/M2736M27V
dc.identifier.urihttp://hdl.handle.net/1903/19771
dc.language.isoenen_US
dc.subject.pqcontrolledSoil sciencesen_US
dc.subject.pqcontrolledEnvironmental scienceen_US
dc.subject.pquncontrolledagricultureen_US
dc.subject.pquncontrolledmanureen_US
dc.subject.pquncontrollednutrient managementen_US
dc.subject.pquncontrolledphosphorusen_US
dc.subject.pquncontrolledsoilen_US
dc.titleEvaluating Soil Phosphorus Dynamics over Timeen_US
dc.typeThesisen_US

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