Influence of Inorganic Fertilizer (NPK 15:15:15) and Cacao (Theobroma cacao L) Leaf Litter Application Rates on Cowpea (Vigna unguiculata L.) Performance in the Tropics. aijas [Internet]. 2020 Jun. 20 [cited 2026 Feb. 1];3(1):14-32. Available from: https://acseusa1.bdtopten.com/index.php/aijas/article/view/14