The Present study was carried out at Bharatpur district of Eastern Rajasthan during 2015- 16, 2016-17 and 2017-18. Potato is one of the most important vegetable crops of the country. The development of the Agriculture is primarily depends on the application of the scientific technologies by making the best use of available resources. One of the major constraints of traditional potato farming is low productivity due to non management of weeds. To increase the production, productivity and quality of agricultural produce, on farm testing are being conducted at various farmers’ field. All the recommended practices were provided to the selected farmers. The data related to the cost of cultivation, production, productivity, gross return and net return were collected as per schedule and analyzed. Result of the present study revealed that the application of Metribuzin 70% wetable powder@ kg. ai./ha. as early post emergence 7 days after sowing recorded the higher yield ( 308 q/ha,) as compared to control (273 q/ha.). The percentage increase in the yield over control was recorded. The technology gap in terms of productivity (42 q/ha.) was computed. The technology index values 12% was recorded. The result of the study indicated the gap existed in the potential yield and demonstration yield is due to soil fertility and weather conditions. By conducting On Farm Testing of proven technology of weeds control, yield potential of potato can be increased upto great extent. This will substantially increase the income as well as the livelihood of the farming community. | Impact of on farm testing on low yield of potato due to weeds in Bharatpur district of Eastern Rajasthan, India