www.accessagriculture.org/slm06-zai-...anting-pits
Access Agriculture Training Video
Zaï as they are known in Burkina Faso, or tassa in Niger, are wide deep planting pits. They act as a microcatchment and can be used to rehabilitate soils when used with manure. They have been very successful in West Africa during the last 25 years.
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