Effects of Grazing Management on Sediment and Phosphorus Runoff (A Progress Report)

dc.contributor.author Haan, Matthew
dc.contributor.author Russell, Jim
dc.contributor.author Mickelson, Steven
dc.contributor.author Powers, Wendy
dc.contributor.author Schultz, Richard
dc.contributor.author Ahmed, S.
dc.contributor.author Kovar, John
dc.date 2018-02-12T23:28:41.000
dc.date.accessioned 2020-06-29T23:49:49Z
dc.date.available 2020-06-29T23:49:49Z
dc.date.copyright Wed Jan 01 00:00:00 UTC 2003
dc.date.issued 2003-01-01
dc.description.abstract <p>In spring 2001, grazing was initiated on pastures at the ISU Rhodes Research Farm to determine the effects of grazing treatment on nutrient and sediment loss from pastureland. Treatments included an ungrazed control, summer hay harvest with winter stockpiled grazing, continuous stocking to a residual height of 2 inches, rotational stocking to a residual height of 2 inches, and rotational stocking to a residual height of 4 inches. At two times (June and August) during the summer, rainfall simulations were conducted at 6 sites within each paddock and 6 sites in a buffer zone beneath each paddock. Rainfall simulators dripped at a rate of 6 liters/10 minutes over a .5-m2 area (2.8 inches/hours) for a period of 1.5 hours. Amounts of rainfall and runoff were recorded at 10-minute intervals during the sampling period. Runoff was collected and analyzed for total sediment, total phosphorus, and dissolved phosphorus. Simultaneous to each rainfall simulation, measurement was taken of ground cover, penetration resistance, surface roughness, slope, the contents of phosphorus and moisture of the soil, and the sward height and mass of forage. Slope and forage treatment in paddocks did not significantly affect the concentration and amount of sediment in runoff. However, the concentrations and amounts of total phosphorus in runoff from paddocks that were grazed were greater than paddocks that were ungrazed or harvested for hay during summer. The concentrations and amounts of total phosphorus in runoff were lower in paddocks that were rotationally stocked to a height of 4 inches than in those that were rotationally stocked to 2 inches. The amounts of sediment and total phosphorus in runoff from paddocks that were grazed were greater than their respective buffers.</p>
dc.format.mimetype PDF
dc.identifier archive/lib.dr.iastate.edu/beefreports_2002/13/
dc.identifier.articleid 1012
dc.identifier.contextkey 3173519
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath beefreports_2002/13
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/11067
dc.language.iso en
dc.relation.ispartofseries Animal Science Research Reports
dc.relation.ispartofseries ASL R1783
dc.source.bitstream archive/lib.dr.iastate.edu/beefreports_2002/13/asl1783.pdf|||Fri Jan 14 19:34:54 UTC 2022
dc.subject.disciplines Animal Sciences
dc.subject.disciplines Bioresource and Agricultural Engineering
dc.subject.keywords ASL R1783
dc.title Effects of Grazing Management on Sediment and Phosphorus Runoff (A Progress Report)
dc.type report
dc.type.genre report
dspace.entity.type Publication
relation.isAuthorOfPublication da46d2fe-a6a7-430e-bd46-3d57438b799f
relation.isAuthorOfPublication 70b34b2e-4540-4fad-b040-b62ff492609f
relation.isSeriesOfPublication 7f3839b7-b833-4418-a6fa-adda2b23950a
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