Northeast Research and Demonstration Farm
A yield performance study was conducted at the ISU NE Research and Demonstration Farm to compare twelve Roundup Ready® soybean varieties, and eleven conventional soybean varieties, one of which is a soybean variety grown for the organic market. Roundup Ultra was applied on the Roundup Ready® varieties, and a conventional herbicide program was used on the commercial soybean varieties to evaluate weed control and grain yield.
Iowa State University
Pecinovsky, Kenneth T., "Roundup Ready and Conventional Soybean Yield Trial" (2001). Iowa State Research Farm Progress Reports. 1783.