title: Biuret, urea and natural proteins as nitrogen supplements for low quality roughage for sheep.
mesh_terms: D000821:Animal Feed; D000818:Animals; D001806:Blood Urea Nitrogen; D002482:Cellulose / Q000378:metabolism; D004032:Diet; D004044:Dietary Proteins / Q000378:metabolism*; D005243:Feces / Q000032:analysis; D008297:Male; D009584:Nitrogen / Q000032:analysis / Q000378:metabolism* / Q000652:urine; D006109:Poaceae; D012756:Sheep / Q000378:metabolism*; D013025:Glycine max; D014508:Urea / Q000378:metabolism*
chemical_list: D004044:Dietary Proteins; D014508:Urea; D002482:Cellulose; D009584:Nitrogen