Shawn P. Conley, Soybean and Wheat Extension Specialist, Department of Agronomy
Early May planting in Wisconsin has been documented to increase yield due to increased light interception (Gaspar and Conley, 2015). In theory, earlier planting can potentially intercept greater amounts of solar radiation due to a longer growing season and therefore longer maturity group (MG) soybean varieties may be better suited to maximize yield if they can mature before a hard fall frost. 2015 provided many WI growers with a longer than normal growing season due to favorable early spring planting condition and a later than normal fall frost. Yet, in some instances (weather or logistical problems) planting can be delayed or replanting may be needed. Therefore, investigating the effect of different MG’s at multiple planting dates across the state would be useful. Thus, DuPont Pioneer and the Wisconsin Soybean Marketing Board have funded a 3-year study to examine proper MG selection at 5 different planting dates across the state to maximize yield. To read more about this study, please click the link below: