4.3. Analysis of changes in forest of Tenira from 1987 to 2018
The changes between 1987 and 2018 showed a considerable reduction in
reforestation areas at (-93.0%) and bare soil at (-48.8%) against an
extension of those of the olive areas at (36.8%) and annual crops at
(18.0%). The regeneration of formation of aleppo pine was low, it marks
only an increase of (+ 11.6%) to (16%) of its areas of distributions.
In the state in 2018; we observed the regression of the maquis of aleppo
pine (- 19%), reforestation to (+76.0%), bare soil in (+70.4%), and
annual crops up to (+34.1%). In this situation the most abundant soil
types are Rendzic Leptosols, Calcaric Cambisols in the northern part of
the study area. We also notice the dominance of the soil Calcisols,
Calcaric Fluvisols and Humic,Cambisols (Rubic-Brunic). The Calcaric
Cambisols type soil cover is clearly regressing (Photos 3).