On nitrogen metabolism in milking cows.
D000641:Ammonia / Q000378:metabolism; D000821:Animal Feed; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D002417:Cattle; D005260:Female; D007774:Lactation; D009584:Nitrogen / Q000378:metabolism*; D011247:Pregnancy; D014176:Protein Biosynthesis; D011506:Proteins / Q000378:metabolism; D011868:Radioisotopes; D013279:Stomach, Ruminant / Q000382:microbiology / Q000502:physiology*; D014508:Urea / Q000378:metabolism
D011506:Proteins; D011868:Radioisotopes; D000641:Ammonia; D014508:Urea; D009584:Nitrogen