Soil fertility research in sub-Saharan Africa: new dimensions, new challenges

E.M.A. Smaling, A.R. Braun

    Research output: Contribution to journalArticleAcademicpeer-review

    59 Citations (Scopus)

    Abstract

    This article describes spatial and temporal variation of soil nutrient stocks at different agro-ecosystem levels in East and West Africa. Whereas researchers preferably address macrovariability, African farmers tend to cherish microvariability. Next, studies at different system levels show that soils are depleted, as nutrients withdrawn by crops or lost by leaching and erosion far exceed nutrient inputs through fertilizers, deposition and biological fixation. It is shown how the absence of spatial and temporal variation in models based on soil fertility variables reduces their predictive value in land use planning and farm household decision-making.
    Original languageEnglish
    Pages (from-to)365-386
    JournalCommunications in Soil Science and Plant Analysis
    Volume27
    Issue number3/4
    Publication statusPublished - 1996

    Keywords

    • soil fertility
    • soil chemistry
    • inorganic compounds
    • minerals
    • africa south of sahara

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