title: Retention of nitrogen by growing heifers given grass silage plus isocaloric supplements containing groundnut meal or urea.
mesh_terms: D000641:Ammonia / Q000378:metabolism; D000821:Animal Feed; D000818:Animals; D010367:Arachis; D002417:Cattle / Q000378:metabolism*; D004032:Diet; D009584:Nitrogen / Q000378:metabolism*; D012417:Rumen / Q000378:metabolism; D012820:Silage; D014508:Urea
chemical_list: D000641:Ammonia; D014508:Urea; D009584:Nitrogen