Application of T-square sampling method in Zagross forests (Case Study: Kermanshah province)
T-square sampling method is one of the distance sampling methods for estimating the plant density and canopy cover.For plant density measurements, three formulas, of Diggle and Grinder Byth have been used.In this study, applicability of these formulas regarding to accuracy of estimate for density and canopy cover of Zagross Oak (Quercus brantii) fo