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Research to identify appropriate means of sustaining tropical soil productivity has intensified during the last 2 decades and promising technologies such as minimum tillage, herbaceous and tree based systems, and improved fallows have been identified. This paper discusses the contribution of soil...


Sanginga, N.Mulongoy, K.Swift, M.[Contribution of soil organisms to the sustainability and productivity cropping systems in the tropics]Contribution of soil organisms to the sustainability and productivity cropping systems in the tropics

Establishment of Leucaena leucocephala was poor at Ibadan (Transition forest-savanna zone) and Fashola (savanna zone, 70 km north of Ibadan) in southwestern Nigeria as a result of low soil fertility and the presence of only a few native rhizobia capable of nodulating it. Inoculation with L. leuco...


Sanginga, N.Danso, S.K.A.Mulongoy, K.Ojeifo, A.A.[Persistence and recovery of introduced Rhizobium ten years after inoculation on Leucaena leucocephala grown on an Alfisol in southwetern Nigeria]Persistence and recovery of introduced Rhizobium ten years after inoculation on Leucaena leucocephala grown on an Alfisol in southwetern Nigeria

Residues from two nitrogen fixing trees, Albizia zygia and Gliricidia sepium and one non nitrogen fixing tree Samania dinklagei and their combination with 50% of rice husk, were evaluated for their effect on growth and yield of rice (Oryza sativa) varieties (Rok 10 and Rok 23) grown in an Oxisol ...


Baggie, I.Zapata, F.Sanginga, N.Danso, S.[Ameliorating acid infertile rice soil with organic residue from nitrogen fixing trees]Ameliorating acid infertile rice soil with organic residue from nitrogen fixing trees

The suitability of sesbania (Sesbania rostrata) as green manure for lowland rice was evaluated in the Inland Valley Swamp (IVS) of Sierra Leone, and attempts were made to identify appropriate methods of its management in combination with urea. Sesbania — rice intercropping and sesbania — rice rot...


Bar, A.R.Baggie, I.Sanginga, N.[The use of Sesbania (Sesbania rostrata) and urea in lowland rice production in Sierra Leone]The use of Sesbania (Sesbania rostrata) and urea in lowland rice production in Sierra Leone

The severity and increase of the Imperata cylindrica constraint as a weed, the decline of the traditional fallow systems as a means of soil fertility management and the lack of inorganic fertilizer appear to have created opportunities for adoption of mucuna (Mucuna pruriens) technology by smallho...


Sanginga, N.Ibewiro, B.Houngnandan, P.Vanlauwe, BernardOkogun, J.A.Akobundu, I.O.Versteeg, M.[Evaluation of symbiotic properties and nitrogen contribution of mucuna to maize grown in the derived savanna of West Africa]Evaluation of symbiotic properties and nitrogen contribution of mucuna to maize grown in the derived savanna of West Africa

The IITA in its research for sustainable soil fertility management has passed through several stages during which legume-based systems were always at the forefront. Alley cropping has N yields of more than 200 kg ha-1 with 50% N2 fixation. In the case of Mucuna cover cropping, the ecological bene...


Carsky, R.Sanginga, N.Schulz, S.Douthwaite, BoruManyong, Victor M.Diels, J.Vanlauwe, BernardKeatinge, J.D.H.[The ability to fix N is not the only key to delivery of the benefits of BNF to farmers: experience of IITA in the savannas of Africa]The ability to fix N is not the only key to delivery of the benefits of BNF to farmers: experience of IITA in the savannas of Africa

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