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Drechsel, Pay ,  Mutwewingabo, B ,  Hagedorn, F ,  Wortmann, Charles S. ,  [Soil and foliar phosphorus determination in Rwanda: Procedures and interpretation] ,  Soil and foliar phosphorus determination in Rwanda: Procedures and interpretation

Wortmann, Charles S. ,  [Foliar nutrient testing with the diagnosis and recommendation integrated system (DRIS) for beans] ,  Foliar nutrient testing with the diagnosis and recommendation integrated system (DRIS) for beans

Wortmann, Charles S. ,  Kisakye, J. ,  Ugen, Michael Adrogu ,  Sengooba, T. ,  [Farmers` participation in bean research in Uganda] ,  Farmers` participation in bean research in Uganda

Kirkby, Roger A. ,  Wortmann, Charles S. ,  Gridley, Howard E. ,  [Impact of the Eastern Africa bean research network on research priorities, national research and farmers] ,  Impact of the Eastern Africa bean research network on research priorities, national research and farmers

Bekunda, Mateete A. ,  Wortmann, Charles S. ,  Bwamiki, D.P. ,  Okwakol, M ,  [Potentials and challenges of soil fertility management in the banana-based cropping systems of Eastern Africa] ,  Potentials and challenges of soil fertility management in the banana-based cropping systems of Eastern Africa

Allen, David J. ,  Ampofo, James Kwasi O. ,  Wortmann, Charles S. ,  [Pragas, doenças e problemas nutricionais do feijoeiro na Africa: guia de campo] ,  Pragas, doenças e problemas nutricionais do feijoeiro na Africa: guia de campo

Wortmann, Charles S. ,  Eledu, CS ,  [Uganda's agroecological zones: a guide for planners and policy markers] ,  Uganda's agroecological zones: a guide for planners and policy markers

Flor Montoya, Carlos A. ,  Lynch, Jonathan P. ,  Wortmann, Charles S. ,  [Diagnosis of nutritional disorders in beans (Phaseolus vulgaris)] ,  Diagnosis of nutritional disorders in beans (Phaseolus vulgaris)

Wortmann, Charles S. ,  Kaizzi, CK ,  Fischler, MA ,  [Farmers` independent experimentation with green manure and/or cover crops: a component of participatory research for improving Ugandan farming systems] ,  Farmers` independent experimentation with green manure and/or cover crops: a component of participatory research for improving Ugandan farming systems

Wortmann, Charles S. ,  Senkoro, C. ,  Cyamweshi, A.R. ,  Kibunja, C.N. ,  Nkonde, D. ,  Munthali, M. ,  Nalivata, P. ,  Nabahungu, L.N. ,  Kaizzi, K. ,  [Maize-nutrient response functions for eastern and southern Africa] ,  Maize-nutrient response functions for eastern and southern Africa