“Poultry Manure Rate for Pot-Plant Bitter Leaf (Vernonia Amygdalina Del.) Production in a Humid Rainforest Zone of Nigeria”. Agriculture, Food, and Natural Resources Journal 1, no. 1 (December 1, 2022): 25–30. Accessed September 11, 2026. https://journals.unizik.edu.ng/afnrj/article/view/8751.