Sami AlHennawi*⁽¹⁾ Laila Habib⁽²⁾ and Tarek Jaafar⁽³⁾

(1). Swaida Research Center, General Commission for Agricultural Research (GCSAR), Damascus, Syria.            Email:

(2). Soil Department, Faculty of Agriculture, Damascus University. Damascus, Syria.

(3). Agricultural Studies Department, General Organization of Remote Sensing (GORS), Damascus, Syria.

(*Corresponding author: Dr. Sami Hennawi. E-Mail: saialhennawi@yahoo.com).

Received: 07/01/2018                                Accepted: 08/02/2018

Abstract

This study carried out on three locations were selected, on topo sequence, with an altitude of 1300 m in the eastern part of the studied area, decreasing to 700 m in Hauran Plain. Then bulk samples were collected from the surface and (c) horizon. A combined sample was treated to obtain granular groups of soil separately (clay, silt and sand). The mineralogical composition of the soil by (X-Ray), showed a dominance of Quartz, then Feldspar and Olivine in sand and silt fractions. Silt granules contained mica and kaolinite in small amounts, but Olivine was absent. Smectite minerals were dominate in the clay granules, with small amounts of Mica and Kaolinite.

Key words: Topographical factor, Jabal Al Arab, Mineralogical composition, X-ray, Smectite.

Full Paper in Arabic: PDF