Southeast Research and Demonstration Farm
Many Iowa soybean producers have adopted Roundup Ready (RR) technology on their farms in recent years. Reduced weed control costs, greater flexibility in herbicide application timing, and the potential for “cleaner” soybean fields are often cited as reasons for using RR technology; however, questions remain about potential profit-robbing yield reductions associated with RR varieties.
Iowa State University
Lundvall, John; Whigham, Keith; Westgate, Mark E.; and Farnham, Dale E., "Roundup Ready vs. Conventional Soybean Yield Comparison" (2001). Iowa State Research Farm Progress Reports. 1834.