?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=K+L&rft.au=Sahrawat%2C+K+L&rft.aulast=Sahrawat&rft.atitle=Urease+activity+in+tropical+rice+soils+and+flood+water&rft.title=Soil+Biology+and+Biochemistry&rft.issn=0038-0717&rft.date=1980&rft.volume=12&rft.pages=195-196&rft.issue=2&rft.genre=article