In range management studies, determination of herbage yield of the vegetation in the area is very important from the aspects of preparation of grazing plans and determination of utilization percentage. One of the biomass yield determination method s in Range Management is the utilization of the relationships between herbage yield and plant characteristics. Aim of this study is to carry out the relationships between some plant characteristics (culm height, plant height, basa i diameter, crown diameter, compressed crown diameter, average leaf height) and herbage yield. In addition to this, creating the plant height-weight curves to able the determination of utilization percent easier is the other aim. Correlation between the herbage yield and plant characteristics according to different plants is as follows. The highest correlation between herbage yield and compressed crown diameter was observed at Dactylis gIomerata L. and Lolium perenne L. The highest correlation between herbage yield and basal diameter was observed at Bromus sterilis L. and A vena sativa L. The highest correlation between herbage yield and leaf height was observed at Poa pratensis L. The highest correlation between herbage yield and crown diameter was observed at HO/ClH lanatus L.