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    Agro-ecology, resource endowment and indigenous knowledge interactions modulate soil fertility in mixed farming systems in central and western Ethiopia

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    Journal Article (666.0Kb)
    Date
    2021
    Author
    Agumas, B.
    Balume, I.
    Musyoki, M.K.
    Benz, M.
    Nziguheba, G.
    Marohn, C.
    Vanlauwe, B.
    Cardisch, G.
    Rasche, F.
    Type
    Journal Article
    Review Status
    Peer Review
    Target Audience
    Scientists
    Metadata
    Show full item record
    Abstract/Description
    Site‐specific soil fertility management requires a fundamental understanding of factors that modulate soil fertility variability in the local context. To verify this assumption, this study hypothesized that soil fertility variability across two regions in Central and Western Ethiopia is determined by inter‐related effects of agro‐ecological zones and farmers’ resource endowment (‘wealthy’ versus ‘poor’ farmers). Mid‐infrared spectroscopy coupled to partial least squares regression (midDRIFTS‐PLSR) and wet‐laboratory analyses were used to assess the soil fertility (soil pH, total soil carbon [TC] and nitrogen [TN], plant‐available phosphorous [Pav] and potassium [Kav]) across four agro‐ecological zones: ‘High‐Dega’ (HD), ‘Dega’ (D), ‘Weina‐Dega’ (WD) and ‘Kola’ (K). MidDRIFTS peak area analysis of spectral frequencies (2,930 [aliphatic C‐H], 1,620 [aromatic C = C], 1,159 [C‐O poly‐alcoholic and ether groups] cm‐1) was applied to characterize soil organic carbon (SOC) quality and to calculate the SOC stability index (1,620:2,930). Higher TC in HD, as well as higher TN and Kav contents in K were found in fields of wealthy compared with poor farmers. Resource endowment dependent soil fertility management options revealed SOC of higher quality in wealthy compared with poor farms in D. Agro‐ecological zones distinctions contributed to these soil fertility differences. Farmers distinguished visually fertile and less fertile fields based on soil colour. Higher pH in K and WD as well as Pav in K and HD were found in fertile (brown/black) than less fertile (red) soils. To conclude, tailor‐made soil fertility management in the local context must consider agro‐ecological zones and resource endowment interactions along with farmers’ indigenous knowledge.
    https://dx.doi.org/10.1111/sum.12706
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/7084
    IITA Authors ORCID
    Generose Nziguhebahttps://orcid.org/0000-0003-4227-2242
    bernard vanlauwehttps://orcid.org/0000-0001-6016-6027
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.1111/sum.12706
    Research Themes
    Natural Resource Management
    IITA Subjects
    Agronomy; Farming Systems; Plant Production; Soil Fertility
    Agrovoc Terms
    Agroecology; Indigenous Knowledge; Soils; Soil Fertility; Ethiopia; Farming Systems
    Regions
    Africa; East Africa
    Countries
    Ethiopia
    Hubs
    Central Africa Hub
    Journals
    Soil Use and Management
    Collections
    • Journal and Journal Articles4839
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