title: Observations on the correlation between the dung disposal systems and the concentration of ammonia in the air of animal houses.
mesh_terms: D000388:Air / Q000032:analysis*; D000641:Ammonia / Q000032:analysis*; D000818:Animals; D002417:Cattle; D006799:Housing, Animal; D012499:Sanitation / Q000379:methods*
chemical_list: D000641:Ammonia