investigation on physiochemical characteristics of soil and plant for finding of indicator species in vardavard region in kaeadj

relationship between plant and sial has special importance, because it is judged about one by considering the another one. soil-plant relationship is used for range trend, range emdttton, range suitability in range species. this research, includes: the analysis of plant different types and dominant species in each type with soil factors such as percentage of lime clay depth, stone and gravel (surface and subsurface), in field, and office works. a) field works : in each type, 10 1m2 plots were selected (exception of 25m2 plots in shrubs in some types). it was surved crown cover and percentage of gravel in special forms. were surveyed. soil was surveyed with digging four profiles in each type and in laboratory for analyses. b) laboratory and office work: in lab lime and clay percentage, soil depth and percentage of stone and gravel in surface and subsurface soil were measured. data were analysed with spss for dos that consequently different plant types and soil factors were classified. dominant plant species were classified with attention to soil factors in each type. correlation between crown cover in plants and soil factors (percentage of clay and lime) was obtained. the highest correlation was between soil depth and plant type (r= 95%). astragalus glaucacanthus has not any correlation with soil factors. acanthophylum gracile has the highest correlation with percentage of clay.