Cattle Temporal and Spatial Distribution in Midwestern Pastures Using Global Positioning (A Progress Report) Bear, Douglas Russell, James 2018-08-25T20:00:28.000 2020-06-29T23:31:46Z 2020-06-29T23:31:46Z Thu Jan 01 00:00:00 UTC 2009 2009-01-01
dc.description.abstract <p>Pastures on five southern Iowa cow-calf farms were used to evaluate the effects of pasture characteristics and microclimatic conditions on cattle grazing cool-season grass pastures with streams and/or ponds. Pastures ranged from 33 to 309 acres and contained varying proportions of coolseason grasses, legumes, sedge, broadleaf weeds, brush, and bare ground. The percentage of pasture area that was shaded ranged from 27 to 73%. Cows were Angus and Angus-cross on four of the farms, and Mexican Corriente on the remaining farm. In spring, summer, and fall of 2007 and 2008, 2 to 3 cows per farm were fitted with Global Positioning System (GPS) collars to record position at 10 minute intervals for periods of 5 to 14 days. Ambient temperature, black globe temperature, dew point, relative humidity, and wind speed and direction were collected with HOBO data loggers at ten minute intervals over the 2007 and 2008 grazing seasons on each farm. Streams, ponds, and fence lines were referenced on a geospatial map and used to establish zones in the pastures. Designated zones were: in the stream or pond, and 50, 100, 200, or greater than 200 ft (Uplands) from the stream or pond (water source). Seventy-four data sets were obtained throughout the 2007 and 2008 grazing seasons. Mean proportions of observations when cattle were in the water source did not differ (P<0.05) between farms. However, mean proportions of time cattle spent within 50, 100, or 200 ft or greater than 200 ft of the water source differed (P<0.05) among farms. The proportion of time cattle were within the riparian area (defined as being in the water source or within 100 feet of the water source) increased with increasing ambient temperature.</p>
dc.identifier archive/
dc.identifier.articleid 1442
dc.identifier.contextkey 3390273
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath ans_air/vol655/iss1/25
dc.language.iso en
dc.relation.ispartofseries Animal Science Research Reports
dc.source.bitstream archive/|||Fri Jan 14 22:55:19 UTC 2022
dc.subject.disciplines Agriculture
dc.subject.disciplines Animal Sciences
dc.subject.disciplines Beef Science
dc.subject.keywords ASL R2402
dc.title Cattle Temporal and Spatial Distribution in Midwestern Pastures Using Global Positioning (A Progress Report)
dc.type article
dc.type.genre beef
dspace.entity.type Publication
relation.isJournalIssueOfPublication 3d9dfb75-1750-45f7-a559-dc2c94d08a2e
relation.isSeriesOfPublication 7f3839b7-b833-4418-a6fa-adda2b23950a
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