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Control of Weeds in an Oat (Avena sativa)—Soybean (Glycine max) Ecofarming Rotation

Published online by Cambridge University Press:  12 June 2017

O. C. Burnside ,
G. A. Wicks  and
D. R. Carlson
O. C. Burnside
Affiliation:
Dep. Agron., Univ. of Nebraska, Lincoln, NE 68583
G. A. Wicks
Affiliation:
Dep. Agron., North Platte, NE 69101
D. R. Carlson
Affiliation:
Dep. Agron., Univ. of Nebraska, Lincoln, NE 68583
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Abstract

Soybeans [Glycine max (L.) Merr.] and oats (Avena sativa L.) were grown in a rotation using reduced or no-tillage crop production systems at Lincoln, Nebraska, over a 4-yr period. Oat stubble was treated after harvest with 3.4 kg/ha of metribuzin [4-amino-6-tert-butyl-3-(methylthio)-as-triazin-5(4H)-one] to reduce the growth of late summer weeds. The following spring soybeans were planted directly into the undisturbed stubble or into a seedbed prepared by tandem discing. Three seedbed preparations, two soybean cultivars, and six preemergence weed control treatments were compared. Glyphosate [N-(phosphonomethyl)glycine] applied at 0.8 kg/ha or tandem discing were equally effective in producing a weed-free seedbed. Herbicides applied preemergence on soybeans were still necessary for the reduced tillage or no-tillage production systems if weeds were to be adequately controlled in soybeans without cultivation. Differences in seed-yield occurred between cultivars only when late summer rains benefited the later maturing ‘Williams' soybeans over earlier maturing ‘Wells'. With adequate weed control, soybeans and oats can be grown in a no-tillage, crop rotation, production system in eastern Nebraska to produce high yields with a minimum of labor and soil exposure.

Keywords

Crop rotationecofallowno-tillagereduced tillageslot planter
Type
Research Article
Information
Weed Science , Volume 28 , Issue 1 , January 1980 , pp. 46 - 50
Copyright
Copyright © 1980 by the Weed Science Society of America 

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References

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