Bob, Joel, and Patrick S. Michael. “Nutrient Dynamics under Unmanaged Rubber, Cocoa, and Oil Palm Plantations in a Sandy Soil under Humid Lowland Tropical Climatic Conditions”. International Journal of Environment 11, no. 1 (June 20, 2022): 46–61. Accessed November 24, 2024. https://nepjol.info./index.php/IJE/article/view/45839.