Zaï pits in Niger, West Africa. The pits concentrate scarce water and nutrients, so providing plants a foothold in exhausted, barren lands. The pits are excavated manually, incurring high labor costs. Photo source: FAO.
Zaï pits in Niger, West Africa. The pits concentrate scarce water and nutrients, so providing plants a foothold in exhausted, barren lands. The pits are excavated manually, incurring high labor costs. Photo source: FAO.
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