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Weed Control for Soybean (Glycine max) Planted in a Stale or Undisturbed Seedbed on Clay Soil

Published online by Cambridge University Press:  12 June 2017

Larry G. Heatherly ,
C. Dennis Elmore  and
Richard A. Wesley
Larry G. Heatherly
Affiliation:
USDA-ARS Soybean Prod. Res. Unit, P.O. Box 343, Stoneville, MS
C. Dennis Elmore
Affiliation:
USDA-ARS Field Crops Mech. Unit, P.O. Box 225, Stoneville, MS 38776
Richard A. Wesley
Affiliation:
USDA-ARS Field Crops Mech. Unit, P.O. Box 225, Stoneville, MS 38776
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Abstract

Field studies were conducted for three consecutive years to determine if PRE and/or POST herbicides were needed in addition to preplant foliar-applied glyphosate and POST cultivation for maximum seed yield of irrigated and nonirrigated soybean planted in stale and undisturbed seedbeds on clay soil. Soybean seed yields following the use of PRE and POST herbicides alone or in combination were similar in all years, and exceeded seed yield following the use of glyphosate plus POST cultivation only. Plantings made in no-till and fall-till seedbeds produced similar seed yields when both PRE and POST herbicides were used. These results indicate that glyphosate plus cultivation was not adequate for soybean in stale seedbed plantings, and that either PRE or POST herbicides, but not both, were required for maximum seed yield.

Keywords

Glyphosate, N-(phosphonomethyl)glycinesoybean, Glycine max (L.) Merr.Soybean yieldglyphosatemetribuzinXanthium strumariumXANST
Type
Research
Information
Weed Technology , Volume 6 , Issue 1 , March 1992 , pp. 119 - 124
Copyright
Copyright © 1990 by the Weed Science Society of America 

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