2.2. Typology of soils
According to Benaouda, 1994; the soils of the Tenira forest are superficial characterized by an enclave between rocky outcrops. The upper horizons of this zone consist of a mixture of sand and calcareous pebbles. Forest soils will evolve under the influence of climatic factors and bedrock (kadik, 1986). The soils of this region belong in most cases to the soils of the mountainous area, calcareous brown soil on calcareous sandstone. On the thuya and the pinerais land covers are: calcareous brown soils, on steep slopes of erosion favor the outcropping of the limestone rock. We meet on tall Pinus alepensus mixed withOak kermes ; the soil type is limestone colluvium with a sandy-loamy texture, the organic matter content is low and can thick. The areas of the recent iso-humic; the brown soil is populated byOak kermes and mastic forest; these soils are characterized by a sufficient amount of organic matter and active limestone (Benaouda, 1994).