Dynamics of the population sizes of cowpea and soybean rhizobia at three locations in West Africa

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dc.creatorMulongoy, K.
dc.creatorAyanaba, A.
dc.date1986
dc.date2025-09-30T15:55:09Z
dc.date2025-09-30T15:55:09Z
dc.date.accessioned2026-06-27T15:54:08Z
dc.descriptionVariation in the population sizes of rhizobia that are capable of nodulating cowpeas and two soybean cultivars with different symbiotic promiscuities was assessed at three locations in West Africa. Maradi, in Niger, is subject to temperature extremes and prolonged drought; the soil contained fewer rhizobia than those at Onne and at the International Institute of Tropical Agriculture both of which are located in the humid zone of Nigeria. Numbers of rhizobia, especially of cowpea rhizobia in the top 15 cm six weeks after planting, were significantly higher in fields cropped to cowpeas than fallow soil, indicating that cowpea crops built up the population of compatible rhizobia in the root zone.Bradyrhizobium japonicum specific for American soybean cultivars had the smallest population at all three locations, confirming the need for inoculating these cultivars with appropriate rhizobia in tropical soils. In fallow plots, in the absence of the host plant, rhizobial population sizes remained stable for four years.
dc.formatapplication/pdf
dc.identifierhttps://hdl.handle.net/10568/176737
dc.identifier.urihttp://hdl.handle.net/123456789/116890
dc.languageen
dc.publisherSpringer
dc.rightsLimited Access
dc.sourceMulongoy, K. & Ayanaba, A. (1986). Dynamics of the population sizes of cowpea and soybean rhizobia at three locations in West Africa. MIRCEN journal of applied microbiology and biotechnology, 2(2), 301-308.
dc.subjectsoybeans
dc.subjectcowpeas
dc.subjectnodulation
dc.subjectnitrogen fixation
dc.subjectinoculation
dc.subjectwest africa
dc.subjecttropical soils
dc.titleDynamics of the population sizes of cowpea and soybean rhizobia at three locations in West Africa
dc.typeJournal Article

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Instituto Internacional de Agricultura Tropical (IITA)