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1 January 2008 Residue Management Tactics for Corn Following Spring Wheat
Randy L. Anderson
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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.

Nomenclature: Corn, Zea mays L., hairy vetch, Vicia villosa Roth, spring wheat, Triticum aestivum L

Randy L. Anderson "Residue Management Tactics for Corn Following Spring Wheat," Weed Technology 22(1), 177-181, (1 January 2008).
Received: 13 July 2007; Accepted: 1 November 2007; Published: 1 January 2008

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