Characterization of some meat bovine breeds. 2: Relation between body size and milk production with productive efficiency

beef cattle birth weight body measurements bovin de boucherie breeds calves cows croisement cruzamiento fertilidad fertilite fertility ganado de carne mensuration corporelle milk yield peso al destete peso al nacimiento poids au sevrage race razas rendement laitier rendimiento lechero ternero vaca vache veau weaning weight