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Estimation of Crop Yield Loss Due to Interference by Multiple Weed Species

  • Scott M. Swinton (a1), Douglas D. Buhler (a2), Frank Forcella (a3), Jeffrey L. Gunsolus (a4) and Robert P. King (a5)...

Abstract

Previous efforts to model crop yield loss from multiple weed species constructed competitive indices based on yield loss from individual weed species. Our model uses a multispecies modification of Cousens’ rectangular hyperbolic yield function to estimate a nonlinear competitive index for weed-crop interference. Results from 13 Minnesota and Wisconsin data sets provide measures of the relative competitiveness of mixed green and yellow foxtails, common lambsquarters, redroot pigweed, velvetleaf, and several other weed species. Competition coefficient estimates are stable over years, but not locations.

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Keywords

Estimation of Crop Yield Loss Due to Interference by Multiple Weed Species

  • Scott M. Swinton (a1), Douglas D. Buhler (a2), Frank Forcella (a3), Jeffrey L. Gunsolus (a4) and Robert P. King (a5)...

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