Abstract
The region considered is the South of Tlemcen (Sidi Djilali), in order to high the analysis of the main soil edaphic factors. This study takes into account on one hand the analysis of the different physicochemical characters and on the other hand, the statistical analysis of these factors.
The soils in our study area show some homogeneity. They have a silty-clay texture. With a presence of clay known for its high retention capacity, this texture also includes a significant percentage of sand in front of the other granulometric elements (Sande: 37.5%, Silt: 30.75%, Clays: 31.75%); The pH of the soil is not very alkaline for this region, it varies between 6.69 to 6.89; The rate of organic matter is very low (0.3 and 0.8%), it justifies the low rate of vegetation cover (20 to 30%) and the rather limited restitution to the soil; The limestone rate is average for this region and does not exceed 24.4%; The analyzed soils are unsalted (0.1 and 0.3 mS / cm). Regarding the color of the soil, it differs from one station to another with a tendency to brownish color expressed according to the international color of Munsell (YR). Furthermore, the biostatistical treatment of data collected through the A.C.P. realized with the help of the software "MINITAB 16" concretized with the help of graphs, the correlations which can exist between the different edaphic parameters studied. These biostatistical results allowed us to analyze in a rather precise way the edaphic factors of the southern slope of the Tlemcen region.