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 ...
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]
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Effect of successive cuttings on nodulation and nitrogen fixation of Leucaena leucocephala using 15N dilution and the difference methods
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...
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]
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Assessment of genetic variability for N2 fixation between and with provenance of Leucaena leucocephala and Acacia albida estimated by 15N labelling techniques
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 ...
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]
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Genetic variability in symbiotic nitrogen fixation within and between provenances of two Casuarina species using the 15Nlabelling methods
Biological N2 fixation (BNF) of hedgerow trees, organic mailer decomposition and nutrient transfer to associated food Crops are the major processes which should actualize the expected benefits of alley cropping systems. Leucaena leucocephala or Gliricid,a sepium can fix between 134 and 274 kg N2 ...
Sanginga, N.
,
Mulongoy , K.
,
[Increasing biological N2 fixation and its contribution to the N cycle in alley cropping]
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Increasing biological N2 fixation and its contribution to the N cycle in alley cropping
There is increasing interest to improve the N2 fixation and P use efficiency of herbaceous and shrub legumes currently being introduced in cereal-based cropping systems in the moist savanna zones of West Africa. Knowledge about N and P nutrition of these legumes can assist in adapting them to new...
Sanginga, N.
,
Okogun, J.A.
,
Akobundu, I.O.
,
Kang, B.T.
,
[Phosphorus requirement and nodulation of herbaceous and shrub legumes in low P soils of a Guinean Savanna in Nigeria]
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Phosphorus requirement and nodulation of herbaceous and shrub legumes in low P soils of a Guinean Savanna in Nigeria
Promiscuous soybean lines have been bred on the basis that they would nodulate freely without artificial inoculation. However, our recent studies have demonstrated that the indigenous rhizobia are not able to meet their full nitrogen (N) requirement. Rhizobia inoculation might be necessary. We ex...
Okogun, J.A
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Sanginga, N.
,
[Can introduced and indigenous rhizobial strains compete for nodule formation by promiscuous soybean in the moist savanna agroecological zone of Nigeria?]
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Can introduced and indigenous rhizobial strains compete for nodule formation by promiscuous soybean in the moist savanna agroecological zone of Nigeria?
Appropriate 15N-labeling methods are crucial for estimating N2-fixation in trees used in agroforestry systems. A 4-year field experiment was conducted on an Alfisol in Southwestern Nigeria to compare the estimates of Na fixed in Leucaena leucocephala, using two non-N2-fixing leguminous trees, Sen...
Sanginga, N.
,
Danso, S.K.A.
,
Zapata, F.
,
[Field measurements of nitrogen fixation in leguminous trees used in agroforestry systems: influence of 15Nlabelling approaches and reference trees]
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Field measurements of nitrogen fixation in leguminous trees used in agroforestry systems: influence of 15Nlabelling approaches and reference trees
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.
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Houngnandan, P.
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Vanlauwe, Bernard
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Okogun, J.A.
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Akobundu, I.O.
,
Versteeg, M.
,
[Evaluation of symbiotic properties and nitrogen contribution of mucuna to maize grown in the derived savanna of West Africa]
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Evaluation of symbiotic properties and nitrogen contribution of mucuna to maize grown in the derived savanna of West Africa
Variation in nodulation and N2 fixation by the Gliricidia sepium/Rhizobium spp. symbiosis was studied in two greenhouse experiments. The first included 25 provenances of G. sepium inoculated with a mixture of three strains of Rhizobium spp. N2 fixation was measured using the 15N isotope dilution ...
Sanginga, N.
,
Manrique, K.
,
Hardarson, G.
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[Variation in nodulation and N2 fixation by the Gliricidia sepium/Rhizobium spp. symbiosis in a calcareous soil]
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Variation in nodulation and N2 fixation by the Gliricidia sepium/Rhizobium spp. symbiosis in a calcareous soil