Van Bibber-Krueger, C L Interactive effects of supplemental Zn sulfate and ractopamine hydrochloride on growth performance, carcass traits, and plasma urea nitrogen in feedlot heifers. [electronic resource] - Journal of animal science Oct 2017 - 4638-4645 p. digital Publication Type: Journal Article ISSN: 1525-3163 Standard No.: 10.2527/jas2017.1764 doi Subjects--Topical Terms: AbattoirsAnimal Feed--analysisAnimalsBlood Urea NitrogenBody CompositionCattle--growth & developmentDiet--veterinaryDietary SupplementsFemalePhenethylamines--administration & dosagePhenotypeSulfates--administration & dosageZinc--administration & dosage