?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=C+L&rft.au=Bielders%2C+C+L&rft.aulast=Bielders&rft.atitle=On-farm+evaluation+of+ridging+and+residue+management+options+in+a+Sahelian+millet-cowpea+intercrop.+1.+Soil+quality+changes.+Soil+Use+and+Management&rft.title=Soil+Use+and+Management&rft.date=2002&rft.volume=18&rft.pages=216-222&rft.issue=3&rft.genre=article