Selected findings on cattle husbandry (Review)

birth rate breeds bulls dairy cows feed intake gain de poids ganancia de peso heterosis longevidad longevity meat yield milk yield mortalidad mortalite mortality oestrus synchronization prise alimentaire (animaux) prostaglandinas prostaglandine prostaglandins race razas rendement en viande rendement laitier rendimiento lechero slaughter weight synchronisation de l'oestrus tasa de natalidad taureau toro vacas lecheras vigueur hybride weight gain