?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Smith%2C+G+D&rft.aufirst=G+D&rft.aulast=Smith&rft.issn=0167-1987&rft.pages=195-215&rft.atitle=Soil+management+options+to+reduce+runoff+and+erosion+on+a+hardsetting+Alfisol+in+the+semi-arid+tropics&rft.volume=25&rft.issue=2-3&rft.title=Soil+%26+Tillage+Research&rft.date=1992&rft.genre=article