Agricultural Innovation Systems (AIS) in System of Rice Intensification in Tripura (2013)To gain self-sufficiency in its principle food grain rice, Tripura state of North East India has been relying on System of Rice intensification (SRI) for past seven years. In the state, SRI has become a mass movement with full participation of research organizations, public extension system, local decentralized administrative units, the farmers and their collectives and media to create awareness. So the study was conducted in the state to understand the actors and factors of the innovation systems in SRI that has contributed in making SRI a success in the state and its implications in the state and the country. Since its up-scaling in farmers’ field in 2006-’07 till 2011-’12, SRI has been gaining momentum in the state with efforts from all the stakeholders and assistance from the right policies. The actors in the SRI innovation systems has played various roles according to their type of organization and has taken up action accordingly to achieve their targets set in SRI expansion in the state. While Department of Agriculture (DoA) has been a key player in the SRI innovation systems in the state, the unique role had been played by the local administrative units, the Panchayati Raj Institutions (PRIs) in creating mass awareness about SRI and providing assistance in development of the cultivators. All the actors had a good information network. The AIS in SRI in Tripura had its own weaknesses like farmers were more the receiver of technology than innovators; media being an isolate, and policies like MGNREGS having a negative impact on the income of SRI farmers through high labour cost or unavailability of labour. But an increased interaction among the actors, especially the DoA, PRIs and farmers, can easily overcome these problems. Integration of stakeholders has promoted knowledge management, sharing, and learning in SRI innovation systems in the state which can be effectively applied in other crops and sectors in the state and the country.