@ARTICLE {ESHETT:1991, title = {A cocoa-based cropping system on basaltic soils (typic tropohumult) in south-eastern Nigeria}, author = {Eshett, E. T. and Ay, P. and Omueti, J. A. and Juo, A. S. R. }, journal = {Beitrage zur tropischen Landwirtschaft und Veterinarmedizin}, year = {1991}, volume = {29}, number = {1}, pages = {13--24}, }