It is commonly stated as fact that soybean is experiencing a yield plateau. However, multiple sources of information from plant breeders, to yield trials, to the USDA suggest that soybean yield is increasing as a modest rate of 0.4 to 0.5 bu/a per year. Soybean yield can be explained by genetic potential, agronomic management, and environment. If growers are experiencing a yield plateau then it is critical to identify the source of this yield loss. For the purposes of this discussion, we will focus on the factors that growers and managers can control; genetic potential and management.
Soil Science Extension
University of Wisconsin Madison