Analysis of selected Production Variables in yam Production in Northern Agricultural Zone, Cross River State, Nigeria. UNIZIK Journal of Agricultural Economics and Extension, [S. l.], v. 2, n. 1, p. 64–72, 2025. DOI: 10.5281/zenodo.18012180. Disponível em: https://journals.unizik.edu.ng/ujaee/article/view/7270. Acesso em: 28 jun. 2026.