Unable to read or write, and without using any modern gadgets or techniques, he simply continued using an ancient African farming practice called ’zai.’ He plants seeds in small holes filled with compost. The holes then fill up with water during the rainy season, so they are able to retain moisture and nutrients during the dry periods.
Along with millet and sorghum, he also managed to start growing new trees, which in turn helped replenish groundwater levels: the soil, shade and organic materials under the trees help hold moisture so it can be absorbed by the soil.
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