The Study of the Effect of Physical and Chemical Properties of Soil on the Mass of Tree Box (Buxus) in Seasangon Jungle

The forestal region Seasangon for it's tree box (Buxus) species belonging to the important forestall reservoir and in one side with respect to the role and importance of soil in growth and maintaining of this valuable species, correlation with physical and chemical characteristics of soil with tree box should be study. For this aim, in studied region three different masses ( pure tree box, tree box mass with other species and masses without tree box) were select that in these masses with accidental method 20 circular plot with 17/84 radius included and in every plot in two depth of 0-2,2-20 centimeters soil sampling is done and elements such as: Nitrogen, Phosphorous, Potassium, and electrical conduction parameter, PH, soil salty, organic matter and 3 caco were measure and soil texture were study. For studying of pedology profile in respected mass, initially we study earlier research on soils on four geographical sides. In this research determined that soil in all of geographical sides is steady and we dont need digging of profile in every side. Hence, digging of four profiles in main geographical side and on typical soil in region were done. With respect to digging profile, soil types are dark brown in the region under suborder Udalf. Horizons acidity is between 6/5 to 7/6 that for mining of organic azote is convenience. Mostly, correlation with C/N 8-14. studying of species accompany with tree box showed that Carpinus, Parrotia and Quercus species one by one 77,61 and 38 percent which they had the most presence in plots that has tree box. Dominant texture in studied plots is loamy and sandy. The conclusion of this research showed that the most value of soil Nitrogen on mixed mass and the less value of that devoted to species without tree box, pure mass of tree box has the most value of PH, electric conduction and soil 3 caco and the mass without tree box has the most values of clay and potassium in soil.