WASET
Agbede, T. , Adekiya, A. (2016). 'Effect of Cocoa Pod Ash and Poultry Manure on Soil Properties and Cocoyam Productivity of Nutrient-Depleted Tropical Alfisol'. World Academy of Science, Engineering and Technology, Open Science Index 111, International Journal of Agricultural and Biosystems Engineering, 10(3), 172 - 179.