Organic grains are essential for the organic food industry. In the U.S., low adoption of organic grain farming has constrained further development of the organic food sector. Organic food industry stakeholders have appealed to producers to increase domestic organic grain production. The U.S. federal government supports research and extension education regarding organic farming. In this context, there is a need for both agricultural researchers and extension professionals to further (1) examine the factors that motivate farmers to adopt organic grain farming and (2) identify the challenges that hinder farmers' adoption of organic grain farming. We conducted 17 in-depth interviews with organic grain farmers in Iowa, USA. By applying multiple social-behavioral theories as part of the analysis and comparing interview results with the literature, we gained insight into the ways in which farmers formed adoption motivations, and we captured the dynamics of the motivations. We specifically identified challenges to adoption that were associated with organic farming operation and management, organic market accessibility, information and inputs availability, social tension, and level of support from the government. These findings shed light on the ways in which farmers' adoption challenges have evolved with institutional, ecological, and technological changes over time and how contemporary research and extension may encourage adoption.
Keywords: adoption; challenges; farmers; motivations; organic grain; qualitative study; sustainable food systems.