Iwanthika G, Seran TH. Yield Response of Cowpea (Vigna unguiculata L.) to Poultry Waste Application With Different Rates of Potassium and Phosphorus Inorganic Fertilizers. Int. J. Environ. [Internet]. 2023 Dec. 31 [cited 2024 Dec. 22];12(2):71-82. Available from: https://nepjol.info/index.php/IJE/article/view/65437