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dc.contributor.authorAndales, Allan A.
dc.contributor.authorDerner, Justin D.
dc.contributor.authorBartling, Patricia N. S.
dc.contributor.authorAhuja, Lajpat R.
dc.contributor.authorDunn, Gale H.
dc.contributor.authorHart, Richard H.
dc.contributor.authorHanson, Jon D.
dc.date.accessioned2020-09-05T21:18:42Z
dc.date.available2020-09-05T21:18:42Z
dc.date.issued2005-05-01
dc.identifier.citationAndales, A. A., Derner, J. D., Bartling, P. N., Ahuja, L. R., Dunn, G. H., Hart, R. H., & Hanson, J. D. (2005). Evaluation of GPFARM for simulation of forage production and cow–calf weights. Rangeland Ecology & Management, 58(3), 247-255.
dc.identifier.issn0022-409X
dc.identifier.doi10.2111/1551-5028(2005)58[247:EOGFSO]2.0.CO;2
dc.identifier.urihttp://hdl.handle.net/10150/643260
dc.description.abstractA modeling approach that assesses impacts of alternative management decisions prior to field implementation would reduce decision-making risk for rangeland and livestock production system managers. However, the accuracy and functionality of models should be verified before they are used as decision-making tools. The goal of this study was to evaluate the functionality of the Great Plains Framework for Agricultural Resource Management (GPFARM) model in simulating forage and cow-calf production in the central Great Plains. The forage production module was tested in shortgrass prairie using April-October monthly biomass values from 2000 through 2002 for warm-season grasses (WSG), cool-season grasses (CSG), shrubs, and forbs. The forage module displayed excellent (99% explained variance) agreement in the 2001 calibration year in tracking growth and senescence trends of WSG and CSG, which constitute the vast majority of the aboveground biomass. Less agreement (35%-39% explained variance) was observed for shrubs and forbs. The model-explained variances of biomass in 2000 and 2002 (verification years) were 80% for WSG, 67% for CSG, 78% for shrubs, and 82% for forbs. Further development is needed to improve predicted plant response to environmental stresses. The cow-calf production module was tested in northern mixed-grass prairie using June-November monthly average cow and calf weights from 1996 through 2001 for March-calving, moderately stocked Hereford pairs. Overall, GPFARM performed well and tracked cow (81% explained variance) and calf (94% explained variance) pre- and postweaning weights. The GPFARM model has functional utility for simulating forage and cow-calf production with satisfactory accuracy at semiarid-temperate sites, such as southeastern Wyoming and northeastern Colorado. Continued development will focus on improving plant response to environmental stresses and testing the model’s functionality as a decision support tool for strategic and tactical ranch management.
dc.language.isoen
dc.publisherSociety for Range Management
dc.relation.urlhttps://rangelands.org/
dc.rightsCopyright © Society for Range Management.
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subjectCentral Great Plains
dc.subjectsimulation models
dc.subjectnorthern mixed-grass prairie
dc.subjectshortgrass prairie
dc.subjectcow-calf production
dc.titleEvaluation of GPFARM for Simulation of Forage Production and Cow-Calf Weights
dc.typetext
dc.typeArticle
dc.identifier.journalRangeland Ecology & Management
dc.description.collectioninformationThe Rangeland Ecology & Management archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact lbry-journals@email.arizona.edu for further information.
dc.eprint.versionFinal published version
dc.description.admin-noteMigrated from OJS platform August 2020
dc.description.admin-noteLegacy DOIs that must be preserved: 10.2458/azu_rangelands_v58i3_bartling
dc.source.volume58
dc.source.issue3
dc.source.beginpage247-255
refterms.dateFOA2020-09-05T21:18:42Z


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