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Journal Article 2003-05

Autor: Sanginga, N.

Nitrogen (N) has been gradually depleted from West African soils and now poses serious threats to food production. Many ways of increasing N supply (e.g. judicious use of inorganic fertilizers and nitrogen-fixing plants) have been tried in West African farming systems. Herbaceous and woody legume...

Enlace original: https://cgspace.cgiar.org/handle/10568/96424

Investigación en Agricultura
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Sanginga, N. ,  [Role of biological nitrogen fixation in legume based cropping systems; a case study of West Africa farming systems] ,  Role of biological nitrogen fixation in legume based cropping systems; a case study of West Africa farming systems
Journal Article 2003-12

Autor: Nwoke, O.C. Vanlauwe, Bernard Diels, J. Sanginga, N. Osonubi, O. Merckx, R.

A large proportion of total P in the soils of the area is unavailable to plants and consequently P is the second most limiting nutrient. The labile and moderately labile phosphorus fractions and adsorption characteristics of surface and subsurface horizons of eleven soil profiles in the derived s...

Enlace original: https://cgspace.cgiar.org/handle/10568/96364

Investigación en Agricultura
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Nwoke, O.C. ,  Vanlauwe, Bernard ,  Diels, J. ,  Sanginga, N. ,  Osonubi, O. ,  Merckx, R. ,  [Assessment of labile phosphorus fractions and adsorption characteristics in relation to soil properties of West African savanna soils] ,  Assessment of labile phosphorus fractions and adsorption characteristics in relation to soil properties of West African savanna soils
Journal Article 2002

Autor: Ahonsi, M. Berner, D. Emechebe, A. Sanginga, N. Lagoke, S.T.O.

Three Pseudomonas syringae pathovar glycinea (Psg) strains known to produce large amounts of ethylene were tested for efficacy in germinating seeds of Striga hermonthica (Del.) Benth. in a laboratory, as were 312 rhizosphere isolates of non-pathogenic fluorescent Pseudomonas spp. and 38 Bradyrhiz...

Trois souches de Pseudomonas syringae pathovar glycinea (Psg), connues pour leur capacité de produire l'ethylene en grande quantité, ont été etudiées en laboratiore afin d'evaluer leur efficacite de germer les grains de Striga hermonthica (Del.). Trois cent douze isolats rhizosphaeriques non-path...

Enlace original: https://cgspace.cgiar.org/handle/10568/92749

Investigación en Agricultura
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Ahonsi, M. ,  Berner, D. ,  Emechebe, A. ,  Sanginga, N. ,  Lagoke, S.T.O. ,  [Selection of nonpathogenic ethyleneproducing rhizobacteria for accelerated depletion of Striga hermonthica seed bank] ,  Selection of nonpathogenic ethyleneproducing rhizobacteria for accelerated depletion of Striga hermonthica seed bank
Conference Paper 1990

Autor: Sanginga, N. Zapata, F. Danso, S.K.A. Bowen, G.D.

Despite the widespread use of Leucaena leucocephala in alley cropping systems, little information is available on the effect of different magagement practices on its nitrogen fixation. We studied the effects of three successive cuttings at 12 week intervals on nodulation and nitrogen fixation of ...

Enlace original: https://cgspace.cgiar.org/handle/10568/101813

Investigación en Agricultura
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Sanginga, N. ,  Zapata, F. ,  Danso, S.K.A. ,  Bowen, G.D. ,  [Effect of successive cuttings on nodulation and nitrogen fixation of Leucaena leucocephala using 15N dilution and the difference methods] ,  Effect of successive cuttings on nodulation and nitrogen fixation of Leucaena leucocephala using 15N dilution and the difference methods
Journal Article 1990

Autor: Sanginga, N. Zapata, F. Danso, S.K.A. Bowen, G.D.

We studied the effect of three successive cuttings on N uptake and fixation and N distribution in Leucaena leucocephala. Two isolines, uninoculated or inoculated with three different Rhizobium strains, were grown for 36 weeks and cut every 12 weeks. The soil was labelled with 50 ppm KNO 3 enriche...

Enlace original: https://cgspace.cgiar.org/handle/10568/101812

Investigación en Agricultura
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Sanginga, N. ,  Zapata, F. ,  Danso, S.K.A. ,  Bowen, G.D. ,  [Effect of successive cuttings on uptake and partitioning of 15N among plant parts of Leucaena leucocephala] ,  Effect of successive cuttings on uptake and partitioning of 15N among plant parts of Leucaena leucocephala
Journal Article 1990

Autor: Sanginga, N. Danso, S.K.A. Zapata, F. Bowen, G.D.

We examined the suitability of four reference crops, i.e., two non-fixing trees,Cassia siamea andEucalyptus grandis, and two uninoculated fixing trees,Leucaena leucocephala andAcacia albida, for measuring fixed N2 fixed in inoculatedL. leucocephala andA. albida grown for 36 weeks in pots. The15N ...

Enlace original: https://cgspace.cgiar.org/handle/10568/101816

Investigación en Agricultura
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Sanginga, N. ,  Danso, S.K.A. ,  Zapata, F. ,  Bowen, G.D. ,  [Influence of reference trees on N2fixation estimates in Leucaena leucocephala and Acacia albicia using 15N_ labelling techniques+A51] ,  Influence of reference trees on N2fixation estimates in Leucaena leucocephala and Acacia albicia using 15N_ labelling techniques+A51
Journal Article 1990

Autor: Sanginga, N. Bowen, G.D. Danso, S.K.A.

Nitrogen fixed in 13 provenances of Acacia albida and 11 isolines of Leucaena leucocephala inoculated with effective Rhizobium strains was measured by 15N techniques and the total N difference method. In the test soil, on the average, L. leucocephala derived about 65% of its total N from atmosphe...

Enlace original: https://cgspace.cgiar.org/handle/10568/101818

Investigación en Agricultura
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Sanginga, N. ,  Bowen, G.D. ,  Danso, S.K.A. ,  [Assessment of genetic variability for N2 fixation between and with provenance of Leucaena leucocephala and Acacia albida estimated by 15N labelling techniques] ,  Assessment of genetic variability for N2 fixation between and with provenance of Leucaena leucocephala and Acacia albida estimated by 15N labelling techniques
Journal Article 1990

Autor: Sanginga, N. Bowen, G.D. Danso, S.K.A.

Differences in the nitrogen-fixing abilities of provenances of Casuarina equisetifolia and C. cunninghamiana were assessed in pot experiments. Three methods, the 15N isotope dilution, the A value and total N difference were used to measure N2 fixed. There was a good agreement between the A value ...

Enlace original: https://cgspace.cgiar.org/handle/10568/101817

Investigación en Agricultura
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Sanginga, N. ,  Bowen, G.D. ,  Danso, S.K.A. ,  [Genetic variability in symbiotic nitrogen fixation within and between provenances of two Casuarina species using the 15Nlabelling methods] ,  Genetic variability in symbiotic nitrogen fixation within and between provenances of two Casuarina species using the 15Nlabelling methods
Journal Article 2004

Autor: Diels, J. Vanlauwe, Bernard Meersch, M.K. van der Sanginga, N. Merckx, R.

Scanty information on long-term soil organic carbon (SOC) dynamics hampers validation of SOC models in the tropics. We observed SOC content changes in a 16-year continuously cropped agroforestry experiment in Ibadan, south-western Nigeria. SOC levels declined in all treatments. The decline was mo...

Enlace original: https://cgspace.cgiar.org/handle/10568/96324

Investigación en Agricultura
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Diels, J. ,  Vanlauwe, Bernard ,  Meersch, M.K. van der ,  Sanginga, N. ,  Merckx, R. ,  [Longterm soil organic carbon dynamics in a subhumid tropical climate: 13C data in mixed C3/C4 cropping and modeling with ROTHC] ,  Longterm soil organic carbon dynamics in a subhumid tropical climate: 13C data in mixed C3/C4 cropping and modeling with ROTHC
Journal Article 2007

Autor: Nwoke, O.C. Diels, J. Abaidoo, R.C. Sanginga, N.

The differential ability of genotypes of soybean (Glycine max) and cowpea (Vigna unguiculata) to thrive under low-phosphorus (P) conditions by utilising P from sources with low solubility was assessed in a greenhouse study with a low-P savanna soil collected from a research field in Fashola, sout...

Enlace original: https://cgspace.cgiar.org/handle/10568/92167

Investigación en Agricultura
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Nwoke, O.C. ,  Diels, J. ,  Abaidoo, R.C. ,  Sanginga, N. ,  [Utilization of phosphorus from different sources by genotypes of promiscuous soybean and cowpea in a lowphosphorus savanna soil] ,  Utilization of phosphorus from different sources by genotypes of promiscuous soybean and cowpea in a lowphosphorus savanna soil

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