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Nziguheba, GeneroseZingore, ShamieKihara, JobMerckx, R.Njoroge, S.Otinga, A.Vandamme, E.Vanlauwe, Bernard[Phosphorus in smallholder farming systems of subSaharan Africa: implications for agricultural intensification]Phosphorus in smallholder farming systems of subSaharan Africa: implications for agricultural intensification

Acid soils severely reduce maize (Zea mays L.) yield in the tropics. Breeding for tolerance to soil acidity provides a permanent, environmentally friendly, and inexpensive solution to the problem. This study was carried out to determine the relative importance of additive, dominant, and epistatic...


Ceballos, H.Pandey, S.Narro Leon, LAPérez Velásquez, Juan Carlos[Additive, dominant, and epistatic effects for maize grain yield in acid and non-acid soils]Additive, dominant, and epistatic effects for maize grain yield in acid and non-acid soils

Nitrogen fixation in nine common bean (Phaseolus vulgaris L.) lines was estimated using the 15N isotope dilution method at two locations in two seasons. In the first season at one location no N2 fixation was detected while in the second season up to 51 kg N ha?1 were estimated. There were signifi...


Kipe-Nolt, Judith A.Vargas, H.Giller, Ken E.[Nitrogen fixation in breeding lines of Phaseolus vulgaris L.]Nitrogen fixation in breeding lines of Phaseolus vulgaris L.
Okeyo, Jeremiah M.Norton, JayKoala, SaidouWaswa, Boaz S.Kihara, JobBationo, B. André[Impact of reduced tillage and crop residue management on soil properties and crop yields in a long-term trial in western Kenya]Impact of reduced tillage and crop residue management on soil properties and crop yields in a long-term trial in western Kenya

Maize improvement at the International Institute of Tropical Agriculture (IITA), which began in the 1970s, built on the germplasm and experience of earlier years. The main breeding emphasis was to develop maize cultivars and hybrids with high yield potential and durable resistance to diseases and...


Kamara, A.Y.Menkir, A.Fakorede, M.A.B.Ajala, S.O.Badu-Apraku, B.Kureh, I.[Agronomic performance of maize cultivars representing three decades of breeding in the Guinea Savannas of West and Central Africa]Agronomic performance of maize cultivars representing three decades of breeding in the Guinea Savannas of West and Central Africa

Cowpea is a major food and cash crop in northern Nigeria, providing nutritious grain and a less expensive source of protein for both the rural poor and urban consumers. A number of improved varieties have been developed combining diverse plant type, and different maturity periods, with resistance...


Kamara, A.Y.Omoigui, L.O.Ewansiha, S.U.[Improving the productivity of cowpea in the savannas of northeast Nigeria through participatory evaluation and dissemination of improved varieties]Improving the productivity of cowpea in the savannas of northeast Nigeria through participatory evaluation and dissemination of improved varieties

Esipisu, I.[Quality and yield: supporting smallholder farmers’ decisions on top quality commercial products]Quality and yield: supporting smallholder farmers’ decisions on top quality commercial products

This paper reviews the results of past research conducted from 1965 to 2000 in two major cassava growing areas, the northeastern and eastern parts of Thailand. This research was carried out by the Field Crops Research Institute, Department of Agriculture (DOA), in collaboration with Kasetsart Uni...


Tongglum, AnuchitSuriyapan, PreechaHoweler, Reinhardt H.[Cassava agronomy research and adoption of improved practices in Thailand: Major achievements during the past 35 years]Cassava agronomy research and adoption of improved practices in Thailand: Major achievements during the past 35 years

The paper reviews the available data and current activities on agronomic aspects of cassava in Thailand. These activities were carried out by various national research programs in collaboration with CIAT during 1990-1993. The review shows that the inherent fertility of cassava soils has been depl...


Sittibusaya, C.Tiraporn, C.Tongglum, AnuchitCenpukdee, U.Vichukit, VichanJantawat, SomjateHoweler, Reinhardt H.[Recent progress in cassava agronomy research in Thailand]Recent progress in cassava agronomy research in Thailand

Howeler, Reinhardt H.Palmer, BHartojo, KPiggin, Colin[Evaluation of cassava and bean germplasm in East Timor from 2000 to 2003]Evaluation of cassava and bean germplasm in East Timor from 2000 to 2003

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