Regional presumptive milking standards reflecting lactation number and stage of cows and season of milking for milk yield and its constituents

agricultura agriculture agronomic characters animal animal domestique animal fats animal laitier animal pour cuirs et peaux animal production animal products animales animales de carne animales lecheros animals artiodactyla artiodactyle bovidae bovide bovin bovine bovines calidad cattle corps gras cows domestic animals fats ganado ganado bovino grasas grasas animales livestock mammals meat animals milk production normas norme production production animale productividad productivity productos productos de origen animal products produit produit d'origine animale profitability quality rendement rendimiento rentabilidad rumiante ruminant ruminants standards vaca vache vertebrados vertebrates vertebre yields