title: Long term effectiveness of graded doses of copper oxide needles in suckler cows.
mesh_terms: D000284:Administration, Oral; D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000517:prevention & control*; D003300:Copper / Q000008:administration & dosage / Q000097:blood / Q000172:deficiency* / Q000627:therapeutic use*; D019327:Copper Sulfate; D005260:Female; D007774:Lactation; D008903:Minerals / Q000032:analysis; D006109:Poaceae / Q000032:analysis; D011247:Pregnancy; D012820:Silage / Q000032:analysis
chemical_list: D008903:Minerals; D003300:Copper; D019327:Copper Sulfate