Weeds compete for moisture, nutrients, and light.
In addition, weeds make harvesting and grain storage difficult and grain quality low. Weeds in Kansas soybean fields have been estimated to cause losses of 13 million dollars in production each year. Therefore, weeds need to be controlled effectively and economically, while maintaining maximum soybean yields. T raditional herbicides used to control weeds in soybean fields vary in crop safety and efficacy on weeds. Genetically engineered soybeans that are resistant to Roundup offer excellent crop safety and broad-spectrum weed control.