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.
IFAD / IIED / WBI / VU
Countrywise Communication, CIS Vrije Universiteit Amsterdam
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