نقش خصوصيات فيزيكي و شيميايي خاك در توده اي بلند مازوي جنگل حوزه گلندرود (غرب مازندران )

This research was carried out at four stages : 1-information and background collection ,2-field sampling . 3-soil Test 4-statistics analysis . At first stage , all information related to silviculture ,climatology, geology , pedology and etc were collected . At second stage , three distinicts of Galandroud forest which were located in Noor-Mazandran province and contain pure stands of oak , were selected . In each distinct, six samples with 20R area were allocated , then in the center of each sample , soil profile was dug with 1.5 m depth . Moreover , 30 dominant trees of oak were chosen and statistical parameters of them was measured , then , the accompanied plants were identified . At third stage,many parameters of soil samples were tested . The Results showed that oak . trees grow on six different soil types : Typic Haplumbrepts , Typic udorthents , Mollic Hapludalfs , Typic Rendolls , Lithic Udorthents , Typic udisamments . the mean of diameter and height in three elevation classes ( lower than 500 m , 500-1000m ; higher than 1000m ) was evaluated and It was confirmed that there is a significant difference between measured parameters in three localities with different typs of soil and the highest value of parameters were occured in Typic udorthents soils .