?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=G+S&rft.au=Kang%2C+G+S&rft.aulast=Kang&rft.atitle=A+new+index+to+assess+soil+quality+and+sustainability+of+wheat-based+cropping+systems&rft.title=Biology+and+Fertility+of+Soils&rft.issn=0178-2762&rft.date=2005&rft.volume=41&rft.pages=389-398&rft.issue=6&rft.genre=article