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Wortmann, Charles S.Kisakye, J.Musa, S[Effects of management practices on bean plant yield components in Uganda]Effects of management practices on bean plant yield components in Uganda

Demands for food and fiber are increasing at a faster rate than supply in the medium and high altitude zones of Eastern Africa, while the productivity of the land is apparently declining. In many cases, productivity is constrained primarily by insufficient nutrient supply. To meet future demands ...


Wortmann, Charles S.[Research for sustainable agricultural production systems in high altitude zones of Eastern Africa]Research for sustainable agricultural production systems in high altitude zones of Eastern Africa

This paper addresses considerations for agricultural technology evaluation at various levels. At the research level, considerations include the information need, the resources required to conduct the research and the probability of research success. At the field-level, agronomic feasibility and t...


Wortmann, Charles S.[Agricultural technology evaluation: some considerations]Agricultural technology evaluation: some considerations

A regional workshop was held in Ethiopia (Eastern Africa) to assess the status, future needs, and methodological issues of soil fertility research for bean cropping systems on the continent. Traditional forms of soil fertility maintenance, diagnosis of soil fertility constraints, nutrient require...


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.[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

Wheat (Triticum æstivum L.) is an important East Africa highland crop but yields are low. Information is scarce for optimization of fertilizer use. Research was conducted to determine yield response functions for N, P and K, and to diagnose Mg–S–Zn–B deficiencies. The average grain yield increase...


Cyamweshi, A.R.Nabahungu, L.N.Senkoro, C.J.Kibunja, C.N.Mukuralinda, A.Kaizzi, K.C.Mvuyekure, S.M.Kayumba, J.Ndung'u-Magiroi, Keziah WairimuKoech, M.N.Wortmann, Charles S.[Wheat nutrient response functions for the east Africa highlands]Wheat nutrient response functions for the east Africa highlands
Wortmann, Charles S.Luze, L.Chirwa, RowlandRachier, 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

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