Zaï

Zaï pit process
Zaï in Batodi, municipality of Tajaé, Niger

Zaï or tassa is a farming technique of digging pits in less permeable soil to catch water and concentrate compost.[1] The pits are between 15 and 50 centimetres (0.5 and 2 ft) across and around 5 to 15 centimetres (2 to 6 in) deep, spaced approximately 80 centimetres (3 ft) apart.[1] The technique is traditionally used in western Sahel (Burkina Faso,[2] Niger, Mali) to restore degraded drylands and increase soil fertility.

Zaï holes were reintroduced since the 1980s by Yacouba Sawadogo, a farmer from Burkina Faso, who introduced the innovation of filling them with manure and compost to provide plant nutrients. The manure attracts termites, whose tunnels help further break up the soil. He also slightly increased the size of the holes over the traditional models. Zaï holes help by improving the yields of trees, sorghum, and millet by up to 500 percent.[3]

As an alternative to the zaï technique, some agricultural engineers suggest using a diking technique, especially in the case of very light soils.[4]

See also

References

  1. ^ a b "Sourcebook of Alternative Technologies for Freshwater Augumentation in Africa". United Nations Environment Programme. Archived from the original on 26 March 2003. Retrieved 11 December 2016.
  2. ^ "Zai: Reversing Desertification – Soil International". soilinternational.com. Archived from the original on 9 June 2024. Retrieved 9 June 2024.
  3. ^ Kaboré, Daniel; Reij, Chris (2004). "The emergence and spreading of an improved traditional soil and water conservation practice in Burkina Faso". International Food Policy Research Institute. Archived from the original on 8 January 2013.
  4. ^ Bass, Hans-Heinrich; von Freyhold, Klaus; Weisskoeppel, Cordula (2013). "Wasser ernten, Bäume schützen: Ernährungssicherung im Sahel" (PDF) (in German). pp. 46–48. Archived from the original (PDF) on 4 March 2016. Retrieved 11 December 2016.
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