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Narrow Row Spacing and Canopy Formation Reduces Weed Resurgence in Soybeans (Glycine max)

Published online by Cambridge University Press:  12 June 2017

Fred H. Yelverton  and
Harold D. Coble
Fred H. Yelverton
Affiliation:
Dep. Crop Sci., N.C. State Univ., Raleigh, NC 27695-7620
Harold D. Coble
Affiliation:
Dep. Crop Sci., N.C. State Univ., Raleigh, NC 27695-7620
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Abstract

In 1982 and 1983, effects of soybean row spacing and irrigation on weed resurgence following postemergence herbicide applications were evaluated. Also, ‘Forrest’ and ‘Ransom’ cultivar effects and early and late planting date influences on weed resurgence were evaluated in 1982 and 1983, respectively. In both years, as row spacing increased, weed resurgence increased. Photosynthetically active radiation measurements indicated the amount of weed resurgence coincided closely with the differing amounts of light penetrating to the soil surface. Irrigation, planting date, and cultivars showed no significant effect on weed resurgence. In 1982, a significant cultivar by row spacing interaction was obtained. In 1983, the late planting date showed a trend for less weed resurgence under irrigated conditions, although the difference was not significant. Soybean canopy measurements indicated development was greater under irrigation.

Keywords

Soybean, Glycine max (L.) Merr.Row spacingsoybean canopy developmentsoil shading
Type
Research
Information
Weed Technology , Volume 5 , Issue 1 , March 1991 , pp. 169 - 174
Copyright
Copyright © 1990 by the Weed Science Society of America 

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