Study on Some Soil Properties as Affected by Different Slope Position and Aspect in Mountainous Landform with Different Parent Materials in Masouleh

Slope characteristics (aspect and position) and parent material are effective factors on soil properties. This research was conducted to study the soil physico-chemical properties formed on north and south faces as well as back slope and summit positions which developed on two selected parent rocks such as peridotite and pegmatite in Masouleh area. Thus, 6 representative soil profiles in different positions and aspects were dug and described and then, the soil samples were taken from the two depths of 0-15 and 15-30 cm in 3 replicates from distances of 10-20 meters around the soil profiles. Physico-chemical properties such as soil texture, pH, organic carbon, exchangeable cations, cation exchange capacity (CEC), amorphous and free iron oxides were measured. The results showed that the soils formed on the different parent materials had significant differences (p