Harnessing Soil Microbes for Sustainable Crop Production in Sub- Saharan Africa
Abstract
Sub-Saharan Africa faces a profound agricultural paradox: abundant arable land yet persistent food insecurity driven by severe soil degradation, nutrient mining, and the world's lowest fertilizer use (15-20 kg/ha versus 135 kg/ha globally). Climate change compounds these challenges through increasing drought and erratic rainfall. Harnessing native soil microbiomes; stress-adapted rhizobia, phosphate-solubilizing bacteria, and mycorrhizal fungi offers a low-cost pathway to sustainable intensification. These microbes enhance nitrogen fixation, phosphorus mobilization, drought tolerance, and disease suppression. Successful cases include the N2Africa program reaching 600,000 farmers with rhizobia inoculants, native Bradyrhizobium strains doubling legume yields in Ghana, and local production facilities like Kenya's MEA Ltd. supplying quality products regionally. Adoption barriers include inconsistent performance, poor quality, weak extension, and absent regulations. Priorities include continent-wide microbial resource banks, tailored consortia, harmonized regulations, and strengthened public-private partnerships. Coordinated investment can restore soil health, enhance climate resilience, and improve livelihoods for millions of smallholder farmers.
Keywords
Sub-Saharan Africa; Soil microbiome; Sustainable agriculture; Plant growth- promoting microorganisms
References
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