Additionally, soybeans don't require a large input of higher-cost nitrogen. Maximum yield potential will not be obtained without crop rotation. This is true of every crop, not just soybean. UW research also indicates differences in rotation effect between tillage systems. The same yield loss in a no-till system was only 3.2 percent.
Crop rotation is always a good management practice.
However, if only corn and soybean are grown in rotation, the yield penalty is less for growing soybean in two consecutive years than for growing corn following corn. Flea beetles pose threat to some sweet corn and seed production fields During the summer of 1999, Stewart's Wilt was detected in Wisconsin for the first time in 57 years. This bacterial disease is spread by the flea beetle. Although most grain hybrids have good resistance to Stewart's Wilt, sweet corn and inbreds planted for corn seed production are often susceptible. Normally, this insect is subject to a winter kill-off in climates like we have in Wisconsin.