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Research ArticleResearch

Conservation compliance credit for winter wheat fall biomass production and implications for grain yield

Gregory S. McMaster and W.W. Wilhelm
Journal of Soil and Water Conservation September 1997, 52 (5) 358-363;
Gregory S. McMaster
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W.W. Wilhelm
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ABSTRACT:

Producers participating in federal farm and conservation programs must reduce potential erodibility below certain thresholds on lands classified as highly erodible. The Natural Resource Conservation Service (NRCS) will credit producers in Colorado for the quantity of green winter wheat (Triticum aestivum L.) biomass at the beginning of the winter period towards compliance in reducing erosion. Unfortunately, few data exist on fall winter wheat biomass production, and fall production varies widely based on many site-specific factors at planting and during the fall, and can be expensive to document. To address these problems, a crop simulation model called SHOOTGRO was used to predict the amount of green biomass present. By combining planting dates, sowing rates, and conditions of NO3, NH4, total water in the soil profile, and water in the seedbed layer at planting for three sites in eastern Colorado a total of 216 scenarios were simulated, both to assist NRCS in determining compliance and to better understand the dynamics of early winter wheat biomass production.

Footnotes

  • G.S. McMaster, USDA-ARS, Great Plains Systems Research, P.O. Box E, Fort Collins, CO 80522, (970) 490-8340; W.W. Wilhelm, USDA-ARS, Soil and Water Conservation Research, 119 Keim Hall, University of Nebraska, Lincoln, NE 68583, (402) 472-1512. Email: greg{at}gpsr.colostate.edu Acknowledgments: R. Proctor and D. Harrell have been instrumental in modifying the SHOOTGRO model, running the simulations, and summarizing the results. T. James of the USDA-Natural Resource Conservation Service has provided valuable assistance on various aspects of this project.

  • Copyright 1997 by the Soil and Water Conservation Society

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Journal of Soil and Water Conservation: 52 (5)
Journal of Soil and Water Conservation
Vol. 52, Issue 5
September/October 1997
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Conservation compliance credit for winter wheat fall biomass production and implications for grain yield
Gregory S. McMaster, W.W. Wilhelm
Journal of Soil and Water Conservation Sep 1997, 52 (5) 358-363;

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Conservation compliance credit for winter wheat fall biomass production and implications for grain yield
Gregory S. McMaster, W.W. Wilhelm
Journal of Soil and Water Conservation Sep 1997, 52 (5) 358-363;
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