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Aleppo Pine (Pinus halepensis Mill.) is a volunteering hardy species, very common in Mediterranean regions. This species has great economical, ecological and social values in Algeria. 120 sample plots were laid out on northern and southern slopes of Senalba forest area (Djelfa) located in a semi -arid region, to investigate the effect of altitude, aspect and soil depth on height, circumference at 1.30 m and annual ring growth. The results shown that aspect and altitude were the determining factors of Aleppo Pine growth. Three classes of fertility were distinguished in relation with dominant tree height and age.