For the purpose of present investigation, a teacher made knowledge test was constructed to measure the knowledge of the respondents about composite fish culture practices. The analysis clearly revealed that, the education and socio-economic status were favorable psychological and communication variables played and important roles. However, amongst these psychological, communication and socio-economic variables, innovative proneness, scientific orientation and size of holdings were obtained as the determining factors in the multiple regression analysis. Further, path analysis revealed that scientific orientation through innovative proneness was giving direct effect on the knowledge level of farmers.