?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=Relationships+between+soil+urease+activity+and+other+properties+of+some+tropical+wetland+rice+soils&rft.title=Fertilizer+Research&rft.issn=0167-1731&rft.date=1983&rft.volume=4&rft.pages=145-150&rft.issue=2&rft.genre=article