Field trials were conducted at the Agricultural Research Center-Hays, the Northwest Research-Extension Center at Colby, and on private land near Lenora. The trials at Colby and Lenora were abandoned due to poor crop and weed establishment and lack of soil-applied herbicide activation due to lack of rainfall. At Hays, rainfall was sufficient for crop and weed establishment and herbicide activation, but lack of summer rainfall and extreme temperatures prevented normal crop growth and mid-season weed emergence. Consequently, weed control ratings later than early July were believed to be unreliable and are not reported. Also, soybean plants produced few harvestable seed, thus return on investment was not determined as originally planned.