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Wortmann, Charles S. ,  Allen, David J. ,  [Constraints on bean production in Africa] ,  Constraints on bean production in Africa

Ugen, Michael Adrogu ,  Wortmann, Charles S. ,  [Farmer participation in cultivar evaluation: The case of beans] ,  Farmer participation in cultivar evaluation: The case of beans

Wortmann, Charles S. ,  Walker, F.R. ,  Ngambeki, D.S. ,  [Farmer participatory research: Institutional considerations] ,  Farmer participatory research: Institutional considerations

Alemayehu, A. ,  Tamado, T. ,  Nigussie, D. ,  Yigzaw, D. ,  Kinde, T. ,  Wortmann, Charles S. ,  [Maize–common bean intercropping to optimize maize-based crop production] ,  Maize–common bean intercropping to optimize maize-based crop production

Wortmann, Charles S. ,  Lynch, Jonathan P. ,  [Bean improvement for low fertility in Africa (BILFA): I. Low soil nitrogen availability] ,  Bean improvement for low fertility in Africa (BILFA): I. Low soil nitrogen availability

Wortmann, Charles S. ,  Lunze, Lubanga ,  Lynch, Jonathan P. ,  [Bean improvement for low fertility in Africa (BILFA): II. Low soil phosphorus availability] ,  Bean improvement for low fertility in Africa (BILFA): II. Low soil phosphorus availability