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Wortmann, Charles S. ,  [Workshop on Soil Fertility Research for Bean Cropping Systems in Africa (1988, Addis Ababa, Ethiopia). Proceedings] ,  Workshop on Soil Fertility Research for Bean Cropping Systems in Africa (1988, Addis Ababa, Ethiopia). Proceedings

Wortmann, Charles S. ,  [Screening beans for tolerance to low soil potassium availability] ,  Screening beans for tolerance to low soil potassium availability

Wortmann, Charles S. ,  [The Africa network for screening beans for tolerance edaphic stresses: an overview] ,  The Africa network for screening beans for tolerance edaphic stresses: an overview

Kisakye, J. ,  Wortmann, Charles S. ,  [Development and testing of DRIS foliar norms for bean (Phaseolus vulgaris L.) production] ,  Development and testing of DRIS foliar norms for bean (Phaseolus vulgaris L.) production

Allen, David J. ,  Ampofo, James Kwasi O. ,  Wortmann, Charles S. ,  [Pests, diseases, and nutritional disorders of the common bean in Africa: a field guide] ,  Pests, diseases, and nutritional disorders of the common bean in Africa: a field guide

Wortmann, Charles S. ,  Luze, L. ,  Chirwa, Rowland ,  Rachier, Gideon O. ,  Rabary B. ,  Ndakidemi, P. ,  Mkuchu, M. ,  Muimui, Kennedy K. ,  Nabuhungu, L. ,  [Bean improvement for low fertility soils in Africa: The bilfa II] ,  Bean improvement for low fertility soils in Africa: The bilfa II

Wortmann, Charles S. ,  Eledu, Charles A. ,  David, Soniia ,  Singh, Shree P. ,  [Common bean as a cash earner in Sub-Saharan Africa] ,  Common bean as a cash earner in Sub-Saharan Africa

Wortmann, Charles S. ,  Buruchara, Robin A. ,  Eledu, Charles A. ,  [Distribution of bean root rots in Sub-Saharan Africa] ,  Distribution of bean root rots in Sub-Saharan Africa

Wortmann, Charles S. ,  Regassa, T ,  Mughogho, SK ,  [Research methods for the diagnosis of soil fertility problems] ,  Research methods for the diagnosis of soil fertility problems