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Ojeniyi, S.O and Amusan, O.A and Adekiya, A.O (2013) Effect of Poultry Manure on Soil Physical Properties, Nutrient Uptake and Yield of Cocoyam (Xanthosoma saggitifolium) in Southwest Nigeria. American-Eurasian J. Agric. & Environ. Sci.,, 13 (1). pp. 121-125.