Ekoloji, no.75, pp.33-40, 2010 (SCI-Expanded)
In this research some physical and chemical properties of the soils were analyzed under pure Uludaǧ Fir (Abies nordmanniana ssp. bornmülleriana Mattf.), which is an endemic species of Turkey, and Uludaǧ Fir-Scots Pine (Pinus sylvestris L) mixed stands in Ilgaz Mountain National Park in Turkey. Field studies were conducted on 12 sample areas (6 pure Uludaǧ Fir, 6 Uludaǧ Fir-Scots Pine mixed stands). A total of 24 soil samples from the depth of 0-15 cm and 15-30 cm were gathered from pure Uludaǧ Fir and Uludaǧ Fir- Scots Pine mixed stands. According to the results of the research organic matter content, quantity of clay and moisture content at critical moisture tensions in the soils under the Uludaǧ Fir have found to be higher than the soils of Uludaǧ Fir-Scots Pine mixed stands. Soil reaction (pH) of the soils of both of the two forest constitutes has showed a medium acidic and slight acidic character and values of bulk density were lower in 0-15 cm soil depth than those of 15-30 cm.