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Variations in the natural 13C abundance of soil organic matter (SOM) at different depths combined with SOM radiocarbon dating were used to reconstruct the history of the forest-savanna successions over the last millennium in the Gabon coastal area. A chronosequence was established by comparing th...


Delegue, M.A.Fuhr, M.Schwartz, A.M.Nasi, Robert[Recent origin of most of the forest cover in the Gabon coastal area]Recent origin of most of the forest cover in the Gabon coastal area

A new arbuscular mycorrhizal fungus was isolated from the Southern Guinea savanna in Benin, which represents a tree-rich savanna in the transi-tion between the tropical atlantic rainforests and grass-rich savannas in sub-Saharan West Africa. The fungus was propagated in bait cultures and monospor...


Oehl, F.Tchabi, A.Silva, G.A.Sánchez Castro, I.Palenzuela, J.Monte Junior, I.P. doLawouin, L.Coyne, D.L.Hountondji, F.C.C.[Acaulospora spinosissima, a new arbuscular mycorrhizal fungus from the Southern Guinea Savanna in Benin]Acaulospora spinosissima, a new arbuscular mycorrhizal fungus from the Southern Guinea Savanna in Benin

Attention is being paid to improving the N2 fixation of promiscuous nodulating soybeans in an attempt to develop sustainable cropping systems in the moist savanna. There is however a dearth of reliable estimates of N2 fixation by these promiscuous soybeans and hardly any quantitative information ...


Sanginga, N.Dashiell, Kenton E.Okogun, J.A.Thottappilly, G.[Nitrogen fixation and N contribution by promiscuous nodulating soybeans in the southern Guinea savanna of Nigeria]Nitrogen fixation and N contribution by promiscuous nodulating soybeans in the southern Guinea savanna of Nigeria

International Center for Tropical Agriculture[Savannas program : Biennial report 1992-1993]Savannas program : Biennial report 1992-1993

Phosphorus is important for cowpea production in many tropical African soils with inherent low P fertility. Most farmers in Africa, however, do not have access to P fertilizer. Selection of cowpea lines that produce good yield under low soil P or those with high P-use efficiency can be a low inpu...


Kolawole, G.O.Tian, G.Singh, B.B.[Differential response of cowpea lines to application of P fertilizer]Differential response of cowpea lines to application of P fertilizer

A synthesis of results from the savanna zone of West Africa suggests that cowpea rotation can be considered to be an effective resource management technology in cereal-based systems. Part of the N requirement of cereal crops can be satisfied by cowpea crop rotation. Furthermore, benefits of cowpe...


Carsky, J.R.Vanlauwe, BernardLyasse, O.[Cowpea rotation as a resource management technology for cerealbased systems in the savannas of West Africa]Cowpea rotation as a resource management technology for cerealbased systems in the savannas of West Africa

The Guinea savannas of Nigeria have a high potential for the production of maize because of favourable environmental conditions. Despite this high potential, the yields obtained in farmers' fields are still very low. This is due to soil degradation and nutrient depletion arising from intensificat...


Kamara, A.Menkir, A.Ajala, S.O.Kureh, I.[Performance of diverse maize genotypes under nitrogen deficiency stress in the northern Guinea Savanna of Nigeria]Performance of diverse maize genotypes under nitrogen deficiency stress in the northern Guinea Savanna of Nigeria
Rivas, LAmézquita Collazos, EdgarHoyos, P.Molina , DL[Análisis económico de una estrategia para el manejo de suelos en la altillanuera Colombiana: construcción de la capa arable]Análisis económico de una estrategia para el manejo de suelos en la altillanuera Colombiana: construcción de la capa arable
Rivera, M.Amézquita Collazos, EdgarBernal Riobo, Jaime HumbertoRao, Idupulapati M.[La investigación que logró los productos de desarrollo de las actividades del CIAT y de sus socios colaboradores en los Llanos de Colombia]La investigación que logró los productos de desarrollo de las actividades del CIAT y de sus socios colaboradores en los Llanos de Colombia
Roy, A.C.Sarkarung, SurapongZeigler, Robert S.[Nutrition of savanna rice lines under Colombian savanna soil conditions]Nutrition of savanna rice lines under Colombian savanna soil conditions

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