Effect of tree types on some physical and chemical properties of Nineveh forest soil

	Effect of tree types on some physical and chemical properties of Nineveh forest soil
Journal of Tikrit University For Agriculture Sciences
Article 1, Volume 11, Issue 1, 2011, Pages 215-230
Abstract
This study was conducted on soil of Nineveh Plantation using six locations three of them are on Eucalyptus stands and the other three on Pine stands . Soil samples were taken at depths (0-10cm),(10-30cm),(30-60cm) to study the effect of trees . The study revealed that the soil texture was between loamy and clayey , and the clay increases as the depth increases. The percentage of organic matter showed high at the surface level and their values were from (1.2 - 6.5%) and an average of (3.85%). Potassium (K) had also significant for overall the experiment . It was found that soil samples were not salty and they were slightly alkaline and this may be to active leaching and deep ground water level .Bulk density gave significant differences all over the experiment. Soil carbonate contents were (from 20.8% - to 43% ) and increase with depth . Cation exchange capacities were (13.7 – 37.4) and an average of (25.55%) which is abit high . The study showed a continous improvement of the soil due to the effect of forest trees and field treatments . The results showed that there is nonsignificant effects of Eucalyptus and Pine trees on the studied soil properties .

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