SUMMARY The aim of this research was to evaluate weight gain and the relation benefit - cost of lactating calves, managed under the dual purpose system, supplemented with cottonseed and molasses during the dry season in the Picacho farm in the Municipality of Monteria, Department of Cordoba, Colombia. 26 lactating crossbred calves were used, randomly divided in a control group of 13 animals that received the traditional farm management and an experimental group of 13 animals that received also the traditional farm management and supplement food based on cottonseed and molasses.
coordinar la aplicación de los métodos a que se refiere la letra a) por los laboratorios nacionales de referencia mediante la organización de pruebas comparativas y, en particular, de ensayos de aptitudscielo-abstract scielo-abstract