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    Economic analysis of soil erosion effects in alley cropping, notill and bush fallow systems in southwestern Nigeria

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    Date
    1990
    Author
    Ehui, Simeon K.
    Kang, B.
    Spencer, D.
    Type
    Journal Article
    Metadata
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    Abstract/Description
    Most upland soils in humid and sub-humid tropical Africa are characterized by low inherent fertility and are also susceptible to soil erosion and compaction with cultivation. Based on simulation model, this study uses a capital budgeting approach to determine the profitability of alternative land use systems, taking into account the short and long-run impact of soil erosion on agricultural productivity in southwestern Nigeria. The fallow systems include: (1) two continuous cultivation alley cropping systems with leucaena hedgerows planted at 2 m and 4 m interhedgerows spacings: (2) the continuous cultivation no-till farming system; and (3) two traditional bush fallow systems with a 3-year cropping period in 6- and 12-year cycles. Under a 10 percent discount rate, when no yield penalties are imposed (reflecting the case of population density), the 12-year cycle shifting cultivation system is most profitable, followed by the 4 m alley cropping, the no-till, the 2 m alley cropping and the 6-year cycle shifting cultivation systems. When penalties are imposed on yields due to land being taken out of production because of fallow vegetation (reflecting the case of rising land values), the 4 m alley cropping is most profitable, followed by the no-till, the 2 m alley cropping, the 12- and 6-year cycle bush fallow systems. Thus where access to new forest land is ‘costless', slight yield from erosion will not detract significantly from the immediate profit advantage of traditional bush fallow systems, with longer fallow periods.
    https://doi.org/10.1016/0308-521X(90)90013-G
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/4964
    Digital Object Identifier (DOI)
    https://doi.org/10.1016/0308-521X(90)90013-G
    IITA Subjects
    Crop Systems; Land Use; Soil Surveys And Mapping; Soil Fertility; Soil Health; Farming Systems
    Agrovoc Terms
    Alley Cropping; Land; Cropping Systems; Soil Erosion; Farming Systems
    Regions
    Africa; West Africa
    Countries
    Nigeria
    Collections
    • Journal and Journal Articles4835
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