In hilly-mountainous region of Serbia, meadows and pastures are the main sourcees of roughage feeds and grazing for ruminants. On Stara Planina mountain, in SE Serbia, meadows and pastures with different plant associations and a wide range of species of differing nutritional value predominate. Until the 1930s, and even until now, only species of the grass family and leguminous plants were desired and all other plants were considered worthless or harmful Klapp (1986). The main criteria to evaluate whether a meadow plant species is a weed are: is it poisonous?; is it suitable for consumption by domestic animals as regards its morphology?; do animals eat it or not?; is it nutritious and digestible? This study aimed (1) to quantify the proportion of useful plants, other species and weeds based on the presence of certain plant species at 3 locations in ass. Agrostetum vulgaris and, (2) based on this data, to establish the quality potential for ruminant nutrition. Measures to improve the quality of grassland arise from the results obtained
