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ON-FARM DEMONSTRATION OF EFFECTIVENESS OF EXPORT AND IMPORT OF COMPOSTED DAIRY MANURE THROUGH TURFGRASS SOD
Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.orgCitation: Pp. 494-499 in Total Maximum Daily Load (TMDL) Environmental Regulations–II Proceedings of the 8-12 November 2003 Conference (Albuquerque, New Mexico USA), Publication Date 8 November 2003. .(doi:10.13031/2013.15603)
Authors: D. M. Vietor, T. L. Provin, F. J. Jacoby, S. E. Feagley, R. H. White, T. L. Carpenter, and C. L. Munster
Keywords: Composted dairy manure, Phosphorus, Turfgrass sod, Phosphorus export, Phosphorus import, Phorphorus loss in runoff, On-farm research.
The best management practice of moving manure P and N with turfgrass sod across watershed boundaries was evaluated. The export and import of manure P or N with sod and soil-test P concentration in sod were related to P loading and runoff water quality. Up to 274 kg ha-1 of soil P and 72% of applied manure P were removed in a single sod harvest from a dairy waste application site. Total dissolved P (TDP) losses in runoff after import of manure-grown sod on an 8.5% slope were directly related to soil-test P of sod. Variation of soil-test P in samples of imported sod extracted in water, 10 mM CaCl2, and Olsen, Mehlich III, and acidified ammonium acetate-EDTA solutions accounted for > 77% of variation of TDP concentration in runoff of simulated rain. The soil-test P values could be used alone or as a component of a P index to evaluate impacts of manure-grown sod imports on water quality.(Download PDF) (Export to EndNotes)