Response of lactating cows to added increments of dietary protein and nonprotein nitrogen.
D000704:Analysis of Variance; D000821:Animal Feed; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D002417:Cattle / Q000502:physiology*; D004044:Dietary Proteins / Q000378:metabolism*; D005247:Feeding Behavior; D005260:Female; D007774:Lactation; D009584:Nitrogen / Q000378:metabolism*; D009751:Nutritional Requirements; D011247:Pregnancy; D013025:Glycine max; D014508:Urea / Q000378:metabolism; D003313:Zea mays
D004044:Dietary Proteins; D014508:Urea; D009584:Nitrogen