title: The effect of urea on the intake of straw by fat cows and thin cows.
mesh_terms: D000818:Animals; D001069:Appetite Regulation; D002417:Cattle; D004435:Eating / Q000187:drug effects*; D005260:Female; D009584:Nitrogen / Q000378:metabolism; D009765:Obesity; D013851:Thinness; D014508:Urea / Q000494:pharmacology*
chemical_list: D014508:Urea; D009584:Nitrogen