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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/10168

Title: Distribution of Range Plant Communities as Influenced by Edaphic Factors in Raudhat Khuraim
Authors: S. S. Tag El-Din
A. M. Assaeed
A. A. Al-Sheikh
Issue Date: 1994
Abstract: Raudhat Khuram is a depression of extensive pans against a sand dune belt to the east of Irq Faydat Khuraym, located about 120 km north-east of Riyadh, Saudi Arabia. The Area collects water rain-flow from three watercolurses draining eastwards. The area is liable for flooding. Therefore, soil water retention of the raudhat is higher for a long time than the surrounding areas. High soil moisture is reflected on both vegetation distribution and soil properties. This study was aimed to define the distribution of range plant communities in the northern part of Raudhat Khuraym and to relate soil properties to gegetation cover and distribution. Fifteen plant communities, a semi-bare soil and a bare soil were recongnized. Perennial plant compostion, total vegetation cover anhd species relative cover were defined. Soil samples by layers were collected for physical and chemical analyses. Textukre, calcium carbonate, pH, cations, anions and organic matter were determined. Results revealed that soil properties had an influence on vegetation cover and distribution of different plant communities with different degrees. Properties that had pronounced effect on the distribution of communities were texture, EC, actions of calcium, magnesium and sodium, chloride and bicarbonate anions and surface layer organic matter. Communities with very low vegetation cover had a soil with high magensium cation in one or more of their profile layers.
URI: http://hdl.handle.net/123456789/10168
Appears in Collections:College of Foods And Agricultural Science

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