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dc.contributor.advisorMunster, Clyde L.en_US
dc.creatorChoi, In Hoen_US
dc.date.accessioned2006-10-30T23:24:34Z
dc.date.available2006-10-30T23:24:34Z
dc.date.created2005-08en_US
dc.date.issued2006-10-30
dc.identifier.urihttp://hdl.handle.net/1969.1/4193
dc.description.abstractA total maximum daily load (TMDL) assessment in the Upper North Bosque River (UNBR) has mandated reductions of soluble reactive phosphorus (SRP). The large concentrations of dairies in the UNBR watershed have been identified as a source of the SRP. Agricultural best management practices (BMPs) can be used to reduce in-stream loads of manure nutrients from confined dairy feeding operations (CAFOs). A new BMP utilizes turfgrass sod to export composted dairy manure nutrients out of the impaired watershed in a sustainable manner. Previous plot-scale experiments have showed that 46 to 77% of applied phosphorus (P) and 36 to 47% of applied nitrogen (N) were removed in a single sod harvest. Two, 1.4 ha turfgrass fields were instrumented to measure runoff flow and sediment and nutrient transport. One turfgrass field was topdressed with composted dairy manure and fertilizer N and the other with fertilizer N only. A total of 3.5% of the applied manure P and 3.1% of applied manure N were lost in the surface runoff over a 1.5 year period. The runoff data from the experimental fields were used to calibrate and validate Soil and Water Assessment Tool (SWAT) model simulations of flow, sediment, organic, and mineral nutrients. The Nash-Sutcliffe model fit statistic was greater than 0.6 for flow, sediment, and nutrients during the calibration period and greater than 0.3 during the validation period. Research results indicated that turfgrass sod can be used to export composted dairy manure out of impaired watersheds to improve water and soil quality.en_US
dc.format.extent801590 bytes
dc.format.mediumelectronicen_US
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen_US
dc.publisherTexas A&M Universityen_US
dc.subjectTMDLen_US
dc.subjectagricultural BMPsen_US
dc.subjectdairy manureen_US
dc.subjectPen_US
dc.subjectturfgrassen_US
dc.subjectSWAT modelen_US
dc.subjectCAFOsen_US
dc.subjectUpper North Bosque Riveren_US
dc.titleField-scale evaluation of a system for manure export through turfgrass soden_US
dc.typeThesisen
thesis.degree.departmentBiological and Agricultural Engineeringen_US
thesis.degree.disciplineBiological and Agricutural Engineeringen_US
thesis.degree.grantorTexas A&M Universityen_US
thesis.degree.nameMaster of Scienceen_US
thesis.degree.levelMastersen_US
dc.contributor.committeeMemberMohanty, Binayak P.en_US
dc.contributor.committeeMemberVietor, Donald M.en_US
dc.type.genreElectronic Thesisen_US
dc.type.materialtexten_US
dc.format.digitalOriginborn digitalen_US


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