This project involves coordinating the On-Farm Network, which works with more than 500 Iowa soybean and corn growers who conduct a wide variety of on-farm research studies. The focus is on using precision ag technologies, including GPS, aerial imagery, and combine yield monitors, to determine the economic potential of specific crop production practices, such as use of fertilizers, fungicides, insecticides, pest resistant hybrids or varieties, tillage or other soil management practices, etc. To do this, growers use alternating replicated strips across their field(s) that compare their current management with the practice they want to study. Strips are marked with GPS, so they can be monitored...