Contemporary agricultural practices account for a significant share of greenhouse gas emissions. Inspired by the emergent literature on institutional entrepreneurship, we seek to explore mechanisms that affect an actor’s propensity to act in ways that imply suggesting and promoting emission-reducing practice changes. As influences originating outside the organizational field are assumed to constitute such mechanisms, the paper explores their role through a case study of a project run by a public agency. Unlike extant theory, results show that the agency’s propensity to act is not necessarily enhanced by extra-field influences but that such influences also limit the scope for suggesting change that challenges existing industrial practices.