EN
The aim of this paper was to review the results of studies conducted within last years on the influence of important agronomic factors on the dry matter quality of legumes and their mixtures with grasses. There were discussed some issues related to the influence of first harvest date, harvesting frequency and nitrogen fertilization of legume/grass mixtures on the quality of plant raw material. Considering the relations between development stage, plant morphology and dry matter quality it was found an existing possibility to control the raw material quality and to estimate the dry matter feeding value of these plants with no need of carrying out the chemical analyses.