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Weed Control in a Winter Wheat-Fallow Rotation

Published online by Cambridge University Press:  12 June 2017

O. C. Burnside ,
C. R. Fenster  and
C. E. Domingo
O. C. Burnside
Affiliation:
Department of Agronomy at Lincoln
C. R. Fenster
Affiliation:
Scotts Bluff Station at Mitchell
C. E. Domingo
Affiliation:
U. S. Department of Agriculture, A.R.S., Soil and Water Conservation Research Division, Morris, Minnesota
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Abstract

Weed control during the fallow year and yields of subsequent winter wheat (Triticum aestivum L.) were lower on unsprayed plots than on plots treated with 2-chloro-4-ethylamino-6-isopropylamino-s-triazine (atrazine) at 2 lb/A or 3-amino-l,2,4-triazole (amitrole) at 1/2 lb/A plus 3-(p-chlorophenyl)-l,l-dimethylurea (monuron) at 1 lb/A. The moldboard plow gave the most effective weed control in the winter wheat-fallow rotation followed by the oneway and the sweep plow. Sweep plow tillage left the greatest amount of plant residues on the soil surface to prevent wind and water erosion, but it did not consistently destroy shallow-rooted downy brome (Bromus tectorum L.) plants. Average downy brome stands in winter wheat on fallow plots tilled with the sweep plow, oneway, and moldboard plow were 331, 114, and 16 plants per 54 sq ft, respectively. Winter wheat yields averaged for the sweep plow, oneway, and moldboard plow treatments were 17, 18, and 20 bu/A, respectively. The most feasible method of controlling weeds in a winter wheat-fallow rotation, found in this study, was oneway tillage in combination with the lower herbicide rates.

Type
Research Article
Information
Weed Science , Volume 16 , Issue 2 , April 1968 , pp. 255 - 258
Copyright
Copyright © Weed Science Society of America 

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References

Literature Cited

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