زای (کشاورزی)

Also known as zai pit

thumb|upright=1.3|Zaï pit process thumb|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. The pits are between across and around deep, spaced approximately apart. The technique is traditionally used in western Sahel (Burkina Faso, Niger, Mali) to restore degraded drylands and increase soil fertility.