Grass plays a fundamental role in our country's cattle system, as practically 90% of beef production is based on pasture. Therefore, in a context of scarcity of replacement calves, forage resources must be used efficiently and produce the greatest amount of kilograms of meat possible in an economical way to then decide if confinement is carried out, expressed Dr. Marcos Pereira, executive of the Consortium of Livestock Farmers for Agricultural Experimentation, during the 33rd CEA International Congress, which is taking place at the Conmebol Convention Center.