Onwuka, M.I.Osodeke, V.E.Okolo, N.A.2014-04-042014-04-042007Tropical and Subtropical Agroecosystems, 7 (2007): 41-45http://hdl.handle.net/123456789/206enCocoa husk ashSoil acidityAmeliorationAmelioration of Soil Acidity Using Cocoa Husk Ash for Maize Production in Umudike Area of South East NigeriaArticle