Rotating crops can help manage diseases, insects and weed pressure by removing potential hosts for a year or introducing different pesticides and microclimates based on the crop grown. Low quantity and high quality residue (low carbon to nitrogen ratio) can provide to benefits in the corn-soybean rotation. Several agronomic factors are impacted by crop rotation, such as yield, plant height, standability, weed control and disease pressure.
Soybeans following two years of corn (C-C-S) were shown to produce approximately 3 Bu/A more than soybeans planted after just one year of corn. However, continuous soybean cropping systems can yield 2 to 4% less than soybean fields rotated with corn.
Plant Height And Standability
Soybeans planted in soil that historically supported long-term continuous corn can have excess vegetative growth and grow taller than soybeans in other environments. To reduce lodging risk, select a soybean product with a good standability rating and moderate plant height.
Crop rotation increases the combination of different herbicides, different crop canopies and different tillage situations to provide better weed control. It also makes both corn and soybean rotations less likely for herbicide resistance. To maximize your yield potential, scout early and take steps to control weeds throughout the season. Find out what to look for in your fields.
Long-term continuous corn is an effective tool to decrease the inoculum load of many soybean diseases, including brown stem rot, frogeye leaf spot, sudden death syndrome and white mold. When selecting your soybean products, consider which diseases are generally present and if crop rotation will help decrease inoculum load. Learn more about how to identify common soybean diseases that can threaten your yield potential.