evaluation variation trend in qualitative measures in natural even-aged stand in kheyroud forest

in this research with using of obtained information from a natural fraxinus the variation of quantities and qualitative measures of current stand in an 8 year period was conducted in chelir part of kheyroud forest. data collection was conducted by full callipering method in two periods of 1384 and 1392. during the period of study the parameters of dominant mean height and relative crown height ratio have increased and slenderness coefficient of stand has decreased. with graphing of number distribution in hectare is determined that the stand is an even-age young stand and skewness curve is in right direction schematic figure of both stands are graphed in svs software and is observed the variation of height in during the period. results showed that forest stand during 8 years period has significant changes in quantitative measures.