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Lessons for appropriate soil management technology generation for the savannas and their application to the grain legume-cereal rotation system There are many legume-based techno logies capable of regenerating soi l ferti lity but few are being adopted by fa rmers in West Africa . At the Tn terna...


Carsky, R.J.Douthwaite, BoruManyong, Victor M.Sanginga, N.Schulz, S.Vanlauwe, BernardDiels, J.Keatinge, J.D.H.[Amelioration de la gestion des sols par lintroduction de legumineuses dans les systemes cerealiers des savannes africaines]Amelioration de la gestion des sols par lintroduction de legumineuses dans les systemes cerealiers des savannes africaines

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

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

Leaf extracts and mulch from 14 multipurpose trees were used to test their effects on maize germination, growth and yield. Maize germination was significantly reduced by leaf extracts of all species with increasing extract concentration. The most drastic reductions were caused by Gliricidia sepiu...


Kamara, A.Y.Akobundu, I.O.Sanginga, N.Jutzi, S.C.[The effects of mulch from selected multipurpose trees on nitrogen nutrition, growth and yield of maize (Zea mays)]The effects of mulch from selected multipurpose trees on nitrogen nutrition, growth and yield of maize (Zea mays)

Data from the derived savanna zone in southern Benin indicated that some intensive cropping systems (maize/Cajanus and maize/Mucuna relays; maize/cotton with Senna siamea hedgerows) returned about 12 Mg DM ha-1 year-1 of plant biomass to the soil. This compared favorably with the 8 Mg DM ha-1 yea...


Diels, J.Lyasse, O.Sanginga, N.Vanlauwe, BernardAihou, K.Iwuafor, E.N.O.Merckx, R.Deckers, J.[Options for soil organic carbon maintenance under intensive cropping in the West African savanna]Options for soil organic carbon maintenance under intensive cropping in the West African savanna

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 13C natural labeling technique in combination with modeling could potentially be used to analyze SOM changes in long-term experiments involving complex cropping systems such as agroforestry systems. It requires information on quantity and 13C abundance of all plant materials entering the soil...


Diels, J.Vanlauwe, BernardSanginga, N.Coolen, E.Merckx, R.[Temporal variations in plant delta 13C values and implications for using the 13C technique in longterm soil organic matter studies]Temporal variations in plant delta 13C values and implications for using the 13C technique in longterm soil organic matter studies

Although the fertility status of soils in the West African moist savanna is generally believed to be low, crop yields on farmers' fields vary widely from virtually nil to values near the potential production. The soil fertility status was evaluated for a number of farmers' fields selected at rand...


Vanlauwe, BernardDiels, J.Lyasse, O.Aihou, K.Iwuafor, E.Sanginga, N.Merckx, R.Deckers, J.[Fertility status of soils of the derived savanna and northern guinea savanna benchmarks and response to major plant nutrients, as influenced by soil type and land use management]Fertility status of soils of the derived savanna and northern guinea savanna benchmarks and response to major plant nutrients, as influenced by soil type and land use management

Fallow management plays a key role in supplying nutrients to the growing crop, suppressing weeds, reducing pests and diseases, and improving the sustainability of cropping systems in the humid forest zone of West and Central Africa. We evaluated soil nutrient concentration, soil acidity and soil ...


Koutika, L.S.Sanginga, N.Vanlauwe, BernardWeise, S.F.[Chemical properties and soil organic matter assessment under fallow systems in the forest margins benchmark]Chemical properties and soil organic matter assessment under fallow systems in the forest margins benchmark

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