Strata

Names of strata

Number of investigations

Stratum 1

Sidi Slimane―Sidi Yahya

50

Stratum 2

Oulad Ben Hammadi et Boumaiz

50

Stratum 3

Sfafaa et Kceibya

50

Stratum 4

Azghar et Dar Bel Amri

50

Stratum 5

M'Saada et Oulad H’Cine

50

Stratum 6

Ameur Chamalia

50

Sample

300