By Dr. Laura Lindsey, Adapted from C.O.R.N. 20-2021
Reports from surrounding states suggest defoliation or stem damage in soybeans are less critical to yield if they occur in vegetative stages, with stem damage being more critical to yield loss than defoliation (Shapiro et al. 2009). Even if some nodes on the stem were damaged or lost, soybeans can produce branches from the remaining nodes to help recover after hail events. Similar to corn, soybean defoliation and stem damage during reproductive stages will be more impactful on yield than during vegetative stages.
Recovery of fields should be assessed 4-5 days after the storm events at the earliest, and you should plan to contact your crop insurance agent if applicable regarding damage assessment.
A good resource to determine soybean yield loss due to hail damage can be found at: https://extension.unl.edu/statewide/saline/DLFE-10108.pdf.pdf
According to C. A. Shapiro, Extension Soils Specialist, T.A.