Onyemekonwu, R. C., Chisonum, M. and Onyemekihian, F. (2023) “PRODUCTIVITY FACTOR AND CONSTRAINTS ASSOCIATED WITH YAM FARMING AMONG SMALLHOLDER FARMERS IN DELTA STATE, NIGERIA”, Nigerian Journal of Agriculture and Agricultural Technology, 3(2), pp. 110–118. doi: 10.59331/njaat.v3i2.544.