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United States Department of Agriculture

Agricultural Research Service

Title: Evaluation of Gpfarm for Simulation of Forage Production and Cow-Calf Weights.

item Andales, Allan
item Derner, Justin
item Bartling, Patricia
item Ahuja, Lajpat
item Dunn, Gale
item Hart, Richard - RETIRED USDA-ARS
item Hanson, Jonathan

Submitted to: Rangeland Ecology and Management
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: November 6, 2004
Publication Date: May 15, 2005
Citation: Andales, 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 and Management.58:247-255.

Interpretive Summary: Land managers are in need of methods to evaluate impacts of, and reduce decision making risk in, implementing alternative management decisions. A newly developed decision support system for the central Great Plains, the Great Plains Framework for Agricultural Resource Management (GPFARM) model, was used to determine its ability to simulate forage production in shortgrass prairie and cow-calf production in northern mixed-grass prairie. The forage module displayed good agreement in tracking plant functional group growth and senescence trends, although warm-season grass biomass peaked earlier compared to observed data. The cattle module performed well and tracked cow and calf pre- and post-weaning weights. This model has functional utility for rangeland and livestock production system managers as a decision support system.

Technical Abstract:

Last Modified: 7/28/2014