Factorial estimation of the zinc requirement of lactating dairy cows.
D000818:Animals; D002417:Cattle / Q000502:physiology*; D004032:Diet; D004305:Dose-Response Relationship, Drug; D005260:Female; D006128:Growth / Q000187:drug effects; D007774:Lactation / Q000187:drug effects*; D008433:Mathematics; D009751:Nutritional Requirements; D011247:Pregnancy; D015032:Zinc / Q000008:administration & dosage / Q000172:deficiency / Q000378:metabolism*
D015032:Zinc