The present investigation was carried out in Prakasam district duringthe year 2015-16. Twenty eight blackgram farmers and twenty sevenbengalgram farmers were trained by District Agricultural Advisoryand Transfer of Technology Centre during the year 2015-16. Theeffectiveness of the training programme was assessed by studyingknowledge levels of the farmers before and after participating intraining programme. Majority of the blackgram farmers had correctknowledge on fertilizers management (82.14%), pest management(78.57%), YMV resistant varieties (75.00%), weed management(71.43%), seed treatment (67.86%), drought management (64.29%)and disease management (60.71%) after getting trained. In post testmajority of bengalgram farmers had correct knowledge on pestmanagement (81.48%), fertilizer management (77. 78%), irrigationmanagement (70.37%), seed rate (66.67%), seed treatment and diseasemanagement (62.96%). Training programmes on blackgram andbengalgram production technologies had resulted in considerableknowledge gain of farmers. Education, extension contact,innovativeness, trainings undergone and mass media use were thevariables having highly significant relation with knowledge gain ofblackgram farmers. Extension contact, innovativeness, trainingsundergone and mass media exposure of bengalgram farmers had highlysignificant relation with their knowledge gain.