ONYEMEKONWU, R. C.; CHISONUM, M.; ONYEMEKIHIAN, F. PRODUCTIVITY FACTOR AND CONSTRAINTS ASSOCIATED WITH YAM FARMING AMONG SMALLHOLDER FARMERS IN DELTA STATE, NIGERIA. Nigerian Journal of Agriculture and Agricultural Technology, [S. l.], v. 3, n. 2, p. 110–118, 2023. DOI: 10.59331/njaat.v3i2.544. Disponível em: https://njaat.com.ng/index.php/njaat/article/view/544. Acesso em: 22 may. 2025.