RJOAS July 2026 by Semerci Arif (Faculty of Agriculture, Department of Agricultural Economics, Çanakkale Onsekiz Mart University, Çanakkale, Türkiye) In this study, seed factors in paddy, canola and cotton production were examined in terms of economic efficiency level. Within the scope of the research, primary data from 74 enterprises for paddy, 83 enterprises for canola and 136 enterprises for cotton have been used. During the study, the relationship between the seed usage and the amount of yield gained from the unit area in the production of paddy, canola and cotton have been analyzed by using the Cobb-Douglas production function...