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Row Spacing and Seeding Rate
and Affects on Weed Management

USB Grant-Funded Webcast

June 2017

By Shawn P. Conley, Ph.D.
Soybean & Wheat Ext. Specialist
Department of Agronomy
University of Wisconsin-Madison
Phone: 608-262-7975

Watch Presentation (26 min 12 sec)

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Summary: Pigweeds are among the most abundant and troublesome weed species across the Midwest and Midsouth because of their prolific seed production capacity and their ability to rapidly evolve herbicide resistance. This considerable challenge has sparked renewed farmer and practitioner interest in diversifying weed management by implementing integrated weed management (IWM) programs that efficiently manage weeds, increase soybean light interception, and increase grain yield. Our results suggest that even though agronomic practices such as row spacing and seeding rate can positively influence weed crop interactions a combined PRE followed by POST herbicide strategy was our most valuable IWM tool to decrease weed seed production and increase soybean yield.

Responsibility: United Soybean Board (USB) farmer-leaders develop and maintain partnerships with U.S. land grant universities and U.S. ag-focused research organizations such as the Plant Management Network to increase the transfer of checkoff-funded applied and practical production research information to U.S. soybean farmers. USB neither recommends nor discourages the implementation of any advice contained herein, and is not liable for the use or misuse of the information provided.

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