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    • Companion crops (1)
    • Companion planting -- South Africa -- Limpopo (1)
    • Corn -- South Africa -- Limpopo -- Breeding (1)
    • Cowpea (1)
    • Cowpea -- South Africa -- Limpopo (1)
    • Grain yield (1)
    • Intercropping (1)
    • Intercropping -- South Africa -- Limpopo (1)
    • Land equivalent ratio (1)
    • Maize (1)
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