Phenotype characteristics of Holstein Friesian cows and relations to milk yield [dairy cattle, breeds, milk production, statistical analysis]

agricultura agriculture analisis analyse analyse statistique analysis animal animal domestique animal laitier animal pour cuirs et peaux animal production animales animales de carne animales lecheros animals artiodactyla artiodactyle bovidae bovide bovin bovin laitier bovine bovines breeds cattle cows dairy cattle domestic animals ganado ganado bovino ganado de leche livestock mammals meat animals methode methods milk production production production animale race razas rumiante ruminant ruminants statistical analysis statistical methods statistics vaca vache vertebrados vertebrates vertebre