1. Yankton Seed House 3707 Kristi Ln, Yankton, SD 57078 Coordinate: 42.86388,-97.45519 Phone: (605) 661-5400
2. Pioneer Hi-Bred Intl Inc 181 Heritage Dr, Yankton, SD 57078 Coordinate: 42.88845,-97.54776 Phone: (605) 665-1440