Under contract with the United States Agency for International Development and Michigan State University, a study was made comparing diffusion of innovations in Brazil, Nigeria, and India. In India, the study was in two phases: a survey of 108 villages in Andhra Pradesh, Maharashtra, and West Bengal; and a study of adoption behavior among 680 farmers from eight villages in these states. In the villages, it was found that adoption was positively related to the presence of supporting institutions (schools, panchayats, and cooperatives) and access to, and contact with mass media channels of communication. Leaders' receptivity to change affected the whole village. Contact with the outside world was positively related to agricultural adoption among the farmers: contact with extension agents; visits to the city; mass-media contact; secular orientation; and knowledge of political leaders. India should make investments in the social sciences, as well as in agricultural technology; should view supporting institutions as a necessary part of the social infrastructure; should strengthen mass communications; and make plans for employment of labor released from larger, mechanized farms. (EB)