Özet:

To reveal the relationship between growth performance of oak seedlings planted for the soil conservation in Elâzığ province, in 1999, and some site characteristics the research was established. Fifty-four sample plots, which were 20x20 m size, were determined homogeneously according to different altitude, aspect, slope degree and slope position. Identification of oak species of all individuals was made in these sample plots, and two individuals were cut at the root collar to confirm that they were at an even age. Height and root collar diameter measurements of the tree species were carried out in 51 sample plots, disturbed and undisturbed soil samples were taken from soil profiles from different depths. In three plots where oak seedlings could not survive, only soil samples were taken to determine whether the failure was related to the soil characteristics. The collected data were analyzed by the classification and regression tree technique with DTREG software. According to the statistical analysis results, the site characteristics (slope, aspect, altitude, parent material) and soil properties (stored sand and clay, topsoil (solum) depth and organic carbon content) were effective on diameter and height growth performance of Quercus brantii L. (Persian oak) and Q. cerris L. (Turkey oak) species which were directly sown to the soil in Elâzığ province.

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