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Residue Management Tactics for Corn Following Spring Wheat

Published online by Cambridge University Press:  20 January 2017

Randy L. Anderson
Randy L. Anderson*
Affiliation:
U.S. Department of Agriculture–Agricultural Research Service, 2923 Medary Avenue, Brookings, SD 57006
*
Corresponding author's E-mail: randy.anderson@ars.usda.gov
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Abstract

Producers are interested in tactics for managing crop residues when growing corn after spring wheat. We compared five systems of managing spring wheat residues: conventional tillage, no-till, strip-till, cover crop (hairy vetch) with no-till, and cover crop with strip-till following spring wheat. Conventional tillage consisted of chisel plowing and disking, whereas strip-till consisted of tilling a 15-cm band centered on corn rows, which were spaced 76 cm apart. Plots were split into weed-free and weed-infested subplots. Grain yield in weed-free conditions did not differ among treatments. However, weed-free yield was nearly 40% greater than weed-infested corn in conventional tillage. In contrast, weeds reduced yield only 15% with strip-till. Weed density and biomass was twofold greater with conventional tillage compared with the no-till and strip-till treatments. Weed seedlings also emerged earlier with conventional tillage. Increased weed tolerance with strip-till may be related to fertilizer placement. Corn growth and tolerance to weeds in no-till systems may be improved if a starter fertilizer is placed in the seed furrow.

Keywords

Corn, Zea mays L.hairy vetch, Vicia villosa Rothspring wheat, Triticum aestivum L.Cover cropfertilizer placementinterferenceno-tillstrip-tillweed community
Type
Research
Information
Weed Technology , Volume 22 , Issue 1 , March 2008 , pp. 177 - 181
Copyright
Copyright © Weed Science Society of America 

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