Iren, O.B., Uwah, I.D. and Umanah, M.I. (2018) “Response of <I>Amaranthus cruentus</I> to biochar combined with urea fertilizer in Calabar, Nigeria”, Journal Of Agriculture, Forestry & Environment, 3(1), pp. 192–203. Available at: https://jafe.net.ng/index.php/home/article/view/31 (Accessed: 19 April 2025).