In this research studied root depth characterize and Verbascum cheiranthifolium Boiss.) Species biomass density of till range plants from Shabestar environs for using in slopes drabbling. Balance rain is yearly average area max 250 mm and most rain is Usually in May season. Soil Biomass density depends on Species, plant age, place and as perennial Plants increase, soil biomass density will increase. The results of this research showed that Verbascum cheiranthifolium Species with 17 root depth and average stem height 30.25 cm and average over ground of plant biomass is 1.13 gr/m2 and average under ground of plant biomass is 0.20 gr/m2 and indicated that the root of rangeland shrubs can stabile slope soil.
