?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=On+the+criteria+for+comparing+the+ability+of+compounds+for+retardation+of+nitrification+in+soil+&rft.title=Plant+and+Soil&rft.issn=0032-079X&rft.date=1980&rft.volume=55&rft.pages=487-490&rft.issue=3&rft.genre=article