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):110-18. https://doi.org/10.59331/njaat.v3i2.544.