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Trend of soil salinization in Africa and implications for agro-chemical use in semi-arid croplands

dc.contributor.authorOmuto, C.T.
dc.contributor.authorKome, G.K.
dc.contributor.authorRamakhanna, S.J.
dc.contributor.authorMuzira, N.M.
dc.contributor.authorRuley, J.A.
dc.contributor.authorJayeoba, O.J.
dc.contributor.authorRaharimanana, V.
dc.contributor.authorOwusu Ansah, A.
dc.contributor.authorKhamis, N.A.
dc.contributor.authorMathafeng, K.K.
dc.contributor.authorElmobarak, A.A.
dc.contributor.authorVargas, R.R.
dc.contributor.authorKoetlisi, A.K.
dc.contributor.authorDembele, D.
dc.contributor.authorDiwara, M.
dc.contributor.authorMbaikoubou, M.
dc.contributor.authorMaria, R.M.
dc.contributor.authorAdam Boukary, I.
dc.contributor.authorMalatji, A.
dc.contributor.authorAmin, T.M.
dc.contributor.authorKabore, D.
dc.contributor.authorMapeshoane, B.E.
dc.contributor.authorSichinga, S.
dc.contributor.authorKuleile, N.R.
dc.contributor.authorMwango, S.B.
dc.contributor.authorWiese, L.D.
dc.contributor.authorAndich, K.
dc.contributor.authorIsabirye, M.
dc.contributor.authorSamuel, B.G.M.
dc.contributor.authorWalleh, M.E.
dc.contributor.authorNabahungu, N.L.
dc.contributor.authorMusana, B.
dc.contributor.authorKamara, A.
dc.contributor.authorJobe, A.R.
dc.contributor.authorOussou Cossi, T.B.
dc.contributor.authorNyamai, M.
dc.date.accessioned2024-10-03T07:23:12Z
dc.date.available2024-10-03T07:23:12Z
dc.date.issued2024-11-15
dc.identifier.citationOmuto, C.T., Kome, G.K., Ramakhanna, S.J., Muzira, N.M., Ruley, J.A., Jayeoba, O.J., ... & Nyamai, M. (2024). Trend of soil salinization in Africa and implications for agro-chemical use in semi-arid croplands. Science of the Total Environment, 951: 175503, 1-9.
dc.identifier.issn0048-9697
dc.identifier.urihttps://hdl.handle.net/20.500.12478/8565
dc.description.abstractSoil salinization is a gradual degradation process that begins as a minor problem and grows to become a significant economic loss if no control action is taken. It progressively alters the soil environment which eventually negatively affects plants and organism that were not originally adapted for saline conditions. Soil salinization arises from diverse sources such as side-effects of long-term use of agro-chemicals, saline parent rocks, periodic inundation of soil with saline water, etc. In Africa, soil salinization has not been adequately documented particularly in the croplands. The objective of this study was to identify trends of cropland salinization in Africa and how its relationship with long-term land use practices affected the soil environment. The study analysed soil salinization between 1965 and 2020 using measured electrical conductivity (EC), spatial modelling with environmental covariates, and national statistics on cropland expansion and application of mineral fertilizers, herbicides, and pesticides. The results showed increasing trends of EC in Africa due to climatic and land use drivers. Increasing trends of EC, which evidenced salinization, was found in 31 million hectares of topsoils and 18 million hectares of subsoils. About 2 million hectares of croplands were depicted with salinization and >25 million hectares at the risk of salinization in the arid and semi-arid areas. The study also found statistical relationships between semi-arid cropland salinization and trends of agro-chemical use and cropland sizes. There were significant (p < 0.001) positive correlations between semi-arid cropland salinization and trends of cropland expansion and applied nitrogenous fertilizers. It found that increasing trend of applied mineral nitrogenous fertilizers could double the odds of salinization in semi-arid croplands while cropland expansion could increase the odds of semi-arid cropland salinization by >10 %. These findings present ground-breaking baseline information for future works on sustainable land-use practices that can control cropland soil salinization in Africa.
dc.format.extent1-9
dc.language.isoen
dc.subjectAfrica
dc.subjectSoils
dc.subjectSpatial
dc.subjectModelling
dc.subjectAgrochemicals
dc.subjectElectrical Conductivity
dc.titleTrend of soil salinization in Africa and implications for agro-chemical use in semi-arid croplands
dc.typeJournal Article
cg.contributor.affiliationUniversity of Nairobi
cg.contributor.affiliationNational Advanced School of Public Works, Cameroon
cg.contributor.affiliationDepartment of Agricultural Research, Lesotho
cg.contributor.affiliationChemistry and Soil Research Institute, Zimbabwe
cg.contributor.affiliationUniversity of Juba
cg.contributor.affiliationNasarawa State University
cg.contributor.affiliationNational Centre for Applied Research on Rural Development, Madagascar
cg.contributor.affiliationCSIR-Soil Research Institute, Ghana
cg.contributor.affiliationLand and Water Research Centre, Sudan
cg.contributor.affiliationFood and Agriculture Organization of the United Nations
cg.contributor.affiliationGlobal Water Partnership Southern Africa, South Africa
cg.contributor.affiliationInstitute of Rural Economy of Mali
cg.contributor.affiliationInstitute of Agricultural Research of Mozambique
cg.contributor.affiliationNational Institute of Agronomic Research of Niger
cg.contributor.affiliationDepartment of Agriculture, Land Reform and Rural Development, South Africa
cg.contributor.affiliationEnvironment Sustainability Department, United Arab Emirates
cg.contributor.affiliationMinistère en charge de l'Agriculture, Burkina Faso
cg.contributor.affiliationNational University of Lesotho
cg.contributor.affiliationZambia Agricultural Research Institute
cg.contributor.affiliationIntegrated Catchment Management Programme, Lesotho
cg.contributor.affiliationTanzania Agricultural Research Institute
cg.contributor.affiliationInternational Agricultural Science and Policy Consultant, South Africa
cg.contributor.affiliationNational Institute of Agricultural Research, Morocco
cg.contributor.affiliationBusitema University
cg.contributor.affiliationNational Agricultural Research Institute, Eritrea
cg.contributor.affiliationCentre d'Étude et de Recherche de Djibouti
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationRwanda Water Resources Board
cg.contributor.affiliationNjala University
cg.contributor.affiliationMinistry of Agriculture, The Gambia
cg.contributor.affiliationLaboratoire d'Appui à l'Amélioration de la Santé des Sols, de la qualité des Eaux et de la sauvegarde de l'Environnement de l'Institut National des Recherches Agricoles du Bénin
cg.contributor.affiliationKenya Agricultural and Livestock Research Organization
cg.coverage.regionAfrica
cg.coverage.hubCentral Africa Hub
cg.researchthemeNatural Resource Management
cg.identifier.bibtexciteidOMUTO:2024
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectAgronomy
cg.iitasubjectFarming Systems
cg.iitasubjectFood Security
cg.iitasubjectSoil Fertility
cg.journalScience of the Total Environment
cg.accessibilitystatusLimited Access
cg.reviewstatusPeer Review
cg.usagerightslicenseCopyrighted; all rights reserved
cg.targetaudienceScientists
cg.identifier.doihttps://doi.org/10.1016/j.scitotenv.2024.175503
cg.iitaauthor.identifierNsharwasi Nabahungu: 0000-0002-2104-3777
cg.futureupdate.requiredNo
cg.identifier.issue175503
cg.identifier.volume951


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