title: Behavior of urease added to unsterilized, steam-sterilized, and gamma radiation-sterilized black spruce humus.
mesh_terms: D011830:Radiation Effects; D012987:Soil / Q000032:analysis*; D012988:Soil Microbiology; D013227:Steam; D013242:Sterilization; D014508:Urea / Q000378:metabolism*; D014510:Urease / Q000378:metabolism*
chemical_list: D012987:Soil; D013227:Steam; D014508:Urea; D014510:Urease