2011-08-032011-08-031990https://hdl.handle.net/10365/17446AS-987; bovine somatotropin (BST) is a protein hormone used to improve efficiency of milk production. The guide provides information on the hormone.NDSU Agriculture and University Extension: Creative Commons Licensing Deed (http://creativecommons.org/licenses/by-nc-sa/3.0/)Dairying.Drugs.Cattle.AS-987