The extreme weather conditions this growing season are affecting soybean harvest. Soybean plants are shorter than normal resulting in pods that are closer to the ground. Additionally, some Ohio growers are also noticing soybean pod shattering during harvest.
Four soybean seeds per square foot is approximately one bushel per acre yield loss. We found incidents of approximately 8 to 12 seeds per square foot (a 2 to 3 bushel per acre loss). Little can be done to prevent soybeans from shattering, but Iowa State University Extension offers some advice for harvesting shorter than normal soybeans at: http://www.extension.iastate.edu/CropNews/2012/0808hanna.htm .