ABSTRACT:
In southeastern Wyoming, high winds and highly erodible soils can result in serious wind erosion during the transition from alfalfa to corn. Irrigated corn production into alfalfa sod with no-till field preparation using early preplant applied combinations of cyanazine or metohchlor plus atrazine and dicamba was compared to conventional moldboard plow based field preparation which employed combinations of cyanazine or metolachlor plus atrazine at planting. Dicamba was applied as needed for alfalfa escapes. Alfalfa stand was reduced 69% and 98% for no-till and plow systems, respectively. Differences in alfalfa stand reduction did not impact grain yield. Four year (1987-90) means were 10.5 and 10.0 Mg ha−1 (171 and 162 bu acrt−1) for no-till and plow treatments, respectively. The complete removal of alfalfa was not necessary.
Footnotes
James M. Krall is associate professor, Jerry J. Nacbtman is research associate, and Stephen D. Miller is professor in the Department of Plant, Soil, and Insect Sciences, University of Wyoming, Laramie 82071.
- Copyright 1995 by the Soil and Water Conservation Society
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