Shawn P. Conley, Soybean and Wheat Extension Specialist, Department of Agronomy, University of Wisconsin, Madison
We saw the first soybean flowers of the year yesterday at the Arlington Ag Research Station. As we enter the soybean reproductive growth phase there are a few things to keep in mind. The first is that soybean will produce flowers for ~3 to five weeks, depending upon planting date and environment. During that time soybean will abort anywhere from 20 to 80% of the flowers that they produce. Generally it is the first and last flush of flowers produced that are most likely to be aborted.
For additional information please review: The Soy Report: Soybean Flowers, Glyphosate Label, and Wheel Track Damage…Oh My!