For maintaining of Zagros forests role in wild life, water and soil conservation, the suitable solutions and methods for assessing the existing conditions and planning for management of this forests should be given. To detection of suitable sampling method to study tree Diameter at Breath Height in the northern Zagros forest, Blake forest, in Baneeh region, Kurdistan province, and west of Iran ...

Abstract Forest management can be improved by the mechanistic understanding that tree-ring stable isotopes provide. Key tools include genetic selection, competing vegetation control, thinning, and fertilization. These frequently change environmental conditions physiological processes, such as photosynthesis, stomatal conductance, water uptake, nitrogen cycling, which may leave isotopic signatur...