The book examines agro-input and service delivery business models as institutional innovations for inclusive and effective delivery of such services in the small farmer context, based on primary data from the agencies designing and implementing such models and the farmers who make use of these inputs and services. Further, it identifies major issues and challenges in the delivery of farm inputs and services across regions and types of farmers and examines possible policy and enabling provisions to promote cost-effective and high-quality agro-input delivery channels.