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Perennial grass ley rotations with annual crops in tropical Africa: a review

dc.contributor.authorWortmann, C.S.
dc.contributor.authorBilgo, A.
dc.contributor.authorKaizzi, C.K.
dc.contributor.authorLiben, F.
dc.contributor.authorGarba, M.
dc.contributor.authorMaman, N.
dc.contributor.authorSerme, I.
dc.contributor.authorStewart, Z.P.
dc.date.accessioned2022-09-20T12:21:12Z
dc.date.available2022-09-20T12:21:12Z
dc.date.issued2021
dc.identifier.citationWortmann, C.S., Bilgo, A., Kaizzi, C.K., Liben, F., Garba, M., Maman, N., ... & Stewart, Z.P. (2021). Perennial grass ley rotations with annual crops in tropical africa: a review. Agronomy Journal, 1-7.
dc.identifier.issn0002-1962
dc.identifier.urihttps://hdl.handle.net/20.500.12478/7777
dc.description.abstractRotation of grass ley with periods of annual crop production can be a means to increased farming system productivity, sustainability, and profitability. This research review offers interpretations of rotation research results for future African agriculture. Some rotation studies were with naturally generated and severely over-grazed fallows consisting primarily of annual plant species but other studies were with planted and well-managed perennial grass ley. Generally, the rotations increased annual crop yields with soil improvement. System benefits were similar or greater for ley compared with fallow with generally higher fodder yields with ley. Surface crusting of sandy soil in the Sahel is a major concern that may be worsened by fallow due to the deposition of clay and silt particles. Ley and fallow were terminated in all studies with inversion plow tillage with more tillage for subsequent crops while the rotation benefits may be greater with less tillage. Most studies did not have fertilizer use but annual crop yield response to fertilizer was greatly increased following ley in one study and with no system by fertilizer interaction effect in three studies. The profitability of ley rotations will vary with fodder demand which is rapidly increasing, especially near urban areas. Strip cropping, for example, alternate ley with annual crop strips of 5–20 m width and rotation cycles of 6–10 yr, may often be optimal for erosion control and sediment trapping, protection from uncontrolled grazing, and nearby supply of vegetative planting material for ley re-establishment. Rotation management can be improved through experiential learning and experimentation.
dc.description.sponsorshipUnited States Agency for International Development
dc.format.extent1-7
dc.language.isoen
dc.subjectGrasses
dc.subjectPerennials
dc.subjectCrops
dc.subjectTropical Africa
dc.subjectFarming Systems
dc.titlePerennial grass ley rotations with annual crops in tropical Africa: a review
dc.typeJournal Article
cg.contributor.affiliationUniversity of Nebraska-Lincoln
cg.contributor.affiliationInstitut de Environnement et de Recherches Agricoles, Burkina Faso
cg.contributor.affiliationNational Agricultural Research Laboratories, Uganda
cg.contributor.affiliationEthiopian Institute of Agricultural Research
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationInstitut National de Recherche Agronomique du Niger
cg.contributor.affiliationUnited States Agency for International Development
cg.contributor.affiliationKansas State University
cg.coverage.regionAfrica
cg.coverage.regionEast Africa
cg.coverage.countryUganda
cg.coverage.hubHeadquarters and Western Africa Hub
cg.identifier.bibtexciteidWORTMANN:2021
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectAgronomy
cg.iitasubjectCrop Systems
cg.iitasubjectFood Systems
cg.iitasubjectPlant Breeding
cg.iitasubjectPlant Production
cg.journalAgronomy Journal
cg.notesPublished online: 18 Feb 2021
cg.accessibilitystatusOpen Access
cg.reviewstatusPeer Review
cg.usagerightslicenseCreative Commons Attribution 4.0 (CC BY 0.0)
cg.targetaudienceScientists
cg.identifier.doihttps://dx.doi.org/10.1002/agj2.20634
cg.iitaauthor.identifierGarba Maman: 0000-0002-3377-3064
cg.futureupdate.requiredNo
cg.contributor.acknowledgementsManuscript preparation was made possible with the support of the American People provided to the Feed the Future Innovation Lab for Sustainable Intensification through the U.S. Agency for International Development (USAID). The contents are the sole responsibility of the authors and do not necessarily reflect the views of USAID or the U.S. Government. Program activities are funded by the U.S. Agency for International Development (USAID) under Cooperative Agreement no. AID-OAA-L-14-00006.


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