The objective of On Farm Testing is to test and evaluate the findings of Research Stations at the farmer’s field and to refine and modify the   technologies, if required, for better adoption by farmers. It is confirmation of already proven research results under real farming situation. Based on the finding that the farmers do not adopt about 70% of the available technologies, farmer participatory testing of research findings in their own farms becomes imperative. It promotes conviction among farmers and also provides opportunity to refine or modify the recommendations to suit the requirements of the farmers in a given farming situation. Participatory Rural Appraisal (PRA) was conducted to identify the problems faced by the farmers and based on the priority of the problems, OFT was implemented. Economically viable, and operationally feasible technologies matching with farmers needs are identified to solve the problem faced by them. The OFT’s conducted in major crops and allied sectors during the last decade are given below.