title: Further observations on utilization of urea by lactating cows.
mesh_terms: D000641:Ammonia / Q000032:analysis; D000818:Animals; D001806:Blood Urea Nitrogen; D002417:Cattle / Q000378:metabolism*; D005227:Fatty Acids / Q000032:analysis; D005260:Female; D007774:Lactation; D008892:Milk / Q000032:analysis; D009584:Nitrogen / Q000032:analysis / Q000652:urine; D011247:Pregnancy; D012417:Rumen / Q000378:metabolism; D012820:Silage / Q000032:analysis; D014508:Urea / Q000378:metabolism*; D003313:Zea mays
chemical_list: D005227:Fatty Acids; D000641:Ammonia; D014508:Urea; D009584:Nitrogen