Agronomy Journal Journal of Natural Resources and Life Sciences Education
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Published online 1 March 1973
Published in Agron J 65:283-286 (1973)
© 1973 American Society of Agronomy
677 S. Segoe Rd., Madison, WI 53711 USA
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Evaluation of Herbicides for Use in Zero and Minimized Tilled Corn and Sorghum1

L. R. Robison and H. D. Wittmuss2

Adequate weed control has been one of the principal problems associated with developing minimized tillage systems. Recent herbicide releases appear promising for solving the weed control problem. We evaluated ten different preemergence herbicide treatments and one postemergence treatment for 3 years for weed control in till-planted corn (Zea mays L.) and sorghum (Sorghum bicolor, L. Moench). All herbicide treatments were compared on plots that were either disked or nondisked to see if reduction of plant residues improved weed control. All herbicide treatments reduced weed populations and resulted in increased yields compared to the cultivated check. Plots that were disked as opposed to those nondisked were significantly lower in weed yields for 2 years, but were significantly better in crop yields only 1 year.

Most of the herbicides gave excellent weed control even though residues of the previous year's crop averaged 5,218 kg/ha and covered 73% of the ground.

Key Words: Minimized tillage • corn weed control • sorghum weed control

1 Received for publication June 6, 1972. Published with the approval of the Director as paper no. 3407 Journal Series, Nebraska Agr. Exp. Sta. This work was conducted under Project No. 11-8.

2 Professor and Associate Professor of Agronomy and Agricultural Engineering, respectively, University of Nebraska, Lincoln, Nebr. 68503. Current address of L. R. Robison is Agronomy and Horticulture Department, Brigham Young University, Provo, Utah 84601.

Received for publication June 10, 1972.




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Copyright © 1973 by the American Society of Agronomy.