Shawn Conley, Soybean and Wheat Extension Specialist
Delayed soybean plantings coupled with unseasonably cool temperatures in late July and early August have many growers and crop consultants concerned over the stage and state of the WI soybean crop. Though NASS reports March 1 to August 3 GDU accumulation (base 50 F) to be normal, developmentally the early planted WI soybean crop is tracking ~7 days behind normal. At Arlington WI our early planted High Yield Study is just entering the R5 crop growth stage (seed is 1/8 inch long in the pod at one of the four uppermost nodes on the main stem with a fully developed trifoliolate leaf node).
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