title: Rates of rumen fermentation in relation to ammonia concentration.
mesh_terms: D000641:Ammonia / Q000378:metabolism*; D000818:Animals; D005285:Fermentation; D005750:Gastric Juice / Q000378:metabolism; D001467:Hordeum; D012417:Rumen / Q000502:physiology*; D012756:Sheep; D014508:Urea / Q000008:administration & dosage
chemical_list: D000641:Ammonia; D014508:Urea