title: Artificial rearing of pigs. 8. Effect of dietary protein level on performance, nitrogen retention and carcass composition.
mesh_terms: D000375:Aging; D000818:Animals; D001823:Body Composition; D001835:Body Weight; D004044:Dietary Proteins / Q000378:metabolism*; D002149:Energy Intake; D009584:Nitrogen / Q000652:urine; D013552:Swine / Q000254:growth & development / Q000378:metabolism*
chemical_list: D004044:Dietary Proteins; D009584:Nitrogen