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On-farm evaluation and determination of sources of variability of soybean response to Bradyrhizobium inoculation and phosphorus fertilizer in northern Ghana

dc.contributor.authorUlzen, J.
dc.contributor.authorAbaidoo, R.C.
dc.contributor.authorEwusi-Mensah, N.
dc.contributor.authorMasso, C.
dc.date.accessioned2019-12-04T11:27:28Z
dc.date.available2019-12-04T11:27:28Z
dc.date.issued2018-11-15
dc.identifier.citationUlzen, J., Abaidoo, R.C., Ewusi-Mensah, N. & Masso, C. (2018). On-farm evaluation and determination of sources of variability of soybean response to Bradyrhizobium inoculation and phosphorus fertilizer in northern Ghana. Agriculture, Ecosystems & Environment, 267, 23-32.
dc.identifier.issn0167-8809
dc.identifier.urihttps://hdl.handle.net/20.500.12478/4941
dc.descriptionOpen Access Article; Published online: 14 Aug 2018.
dc.description.abstractSoybean yields on smallholder farms in sub-Sahara Africa (SSA) are far below the potential yield thus creating a huge yield gap. Interventions are thus needed to bridge this yield gap and ascertain the factors influencing the yield variation. This study evaluated the on farm response of soybean to rhizobia inoculation and or mineral P fertilizer in Northern and Upper West regions of Ghana in a single non-replicate trial using four treatments: no input (control), TSP fertilizer (P), rhizobia inoculant (I) and TSP plus inoculant (P + I). In addition, the study sought to develop a robust approach for determining responsiveness and non-responsiveness using agronomic and economic indices. The results showed that the average grain yield of plots that received P or I were higher than control plots. Higher grain yield responses were however, obtained by the plots that received combined application of P and Bradyrhizobium inoculant. Grain yield response in the Northern region was higher than in the Upper West region. Response to P and or I were highly variable within and between locations. The cumulative rainfall and some soil factors including soil nitrogen, phosphorus, soil type, organic carbon, pH and texture explained about 42–79% of these variations in soybean grain yield. The agronomic approach for determining responsive and non-responsiveness revealed that 17–40 % and 6–17% of the locations within the Northern and Upper West regions, respectively were responsive to P fertilization and/ or Bradyrhizobium inoculation. However, the economic approach indicated that 64–75% and 14–24% of the locations within the Northern and Upper West regions, respectively were responsive to P fertilization and Bradyrhizobium inoculation. The results imply that rhizobia inoculation is an effective strategy for increasing soybean yield and improving livelihood of smallholder farmers.
dc.description.sponsorshipBill & Melinda Gates Foundation
dc.format.extent23-32
dc.language.isoen
dc.rightsCC-BY-4.0
dc.subjectSmallholders
dc.subjectFarmers
dc.subjectBradyrhiobium
dc.subjectSoil Types
dc.subjectSoybeans
dc.subjectGrain Legumes
dc.subjectYields
dc.subjectGhana
dc.subjectWest Africa
dc.titleOn-farm evaluation and determination of sources of variability of soybean response to Bradyrhizobium inoculation and phosphorus fertilizer in northern Ghana
dc.typeJournal Article
dc.description.versionPeer Review
cg.contributor.crpGrain Legumes and Dryland Cereals
cg.contributor.affiliationKwame Nkrumah University of Science and Technology
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.coverage.regionAfrica
cg.coverage.regionWest Africa
cg.coverage.countryGhana
cg.creator.identifierRobert Abaidoo: 0000-0002-1235-2252
cg.creator.identifierCargele Masso: 0000-0002-3980-6832
cg.researchthemeNATURAL RESOURCE MANAGEMENT
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectGrain Legumes
cg.iitasubjectNatural Resource Management
cg.iitasubjectSoybean
cg.journalAgriculture, Ecosystems & Environment
cg.howpublishedFormally Published
cg.accessibilitystatusOpen Access
local.dspaceid101953
cg.targetaudienceScientists
cg.identifier.doihttps://doi.org/10.1016/j.agee.2018.08.007


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