Uko, Aniefiok E., et al. “Comparative Efficacy of Organic Manures and Urea Fertilizer on Growth and Yield of Okra (<I>Abelmoschus Esculentus (L) Moench< I>)”. Journal Of Agriculture, Forestry & Environment , vol. 3, no. 1, Mar. 2025, pp. 159-72, https://jafe.net.ng/index.php/home/article/view/28.