CORN YIELD AFTER 10 YEARS OF DIFFERENT CROPPING SEQUENCES AND WEED MANAGEMENT-PRACTICES

In this study, corn yield was measured after 10 yr of various rotation al sequences of corn, soybeans, and wheat or oats, and under three lev els of weed management to determine the effects of land use history on crop yield. Corn yield varied significantly with both crop rotation a nd weed management. Corn yields were lower after continuous corn or so ybeans or immediately following corn, and higher after a cereal crop o r a rotation including a cereal. Herbicide application alone maintaine d significantly higher corn yield than inter-row cultivation across cr opping systems.