Iowa State University (ISU) has a long-standing relationship with Iowa corn and soybean farmers. As a part of this relationship, ISU works to provide quality, unbiased information to assist the decision-making process on farm operations. In 2006, ISU began to expand this commitment with the assistance of northwest Iowa farmers by conducting more trials in their fields. The ISU on-farm cooperator trial program has grown to cover other areas across Iowa. The program links the resources of the ISU research farms, the technical expertise of the ISU field agronomists, the support of the local research farm associations, and volunteer farmer-cooperators to create a system of on-farm trials for Iowa.