Development of vegetation is the most important ecology managment Effort of desert erea, that is possible by recognizing Flor and knowing charactristic of ecologic growth ereas . there are growth lands with herbal couer of sandy plants in sandy lands and hills of dry lands Df Sabzevar plain And the most important spiecies according dominance is stipagrostis pennata.

      In this research ,restricted areas of this growth land by using of current sources is determined and major characteristic of growth land in the field of hight, rate of rains , soil cover and  chemical elements of soil and kind of Distribution of plant communities in desert studies by Using of systematic sampling – randomly in 4 research sites is considerated and condition of stability species and ecologic factors and soil is studied and spss software is used for analyzing of data. In the sandy region of studied casses herbal cover were consisted of 3 tips of salsola – Astragalus – stipagrostis and speice had the most cotraction between other speices, which has ecologic stability in desert environ ments  against of less uariety of this plant, species of this habitate in the least rate of yearly rain and desert area with a soil pH 9/8 to – 9/7 and EC  34- 44 ds/m has a suitable growth – in Varience analisiz between growth factors and soil habitates founded that there is direct and real relation between vate of calcium of soil and type of species covers and A less allcoli soil has better effect on thye type of cover of this specie in the region of has researched studied.