?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=B&rft.au=G%C3%A9rard%2C+B&rft.aulast=G%C3%A9rard&rft.atitle=Destructive+and+non-destructive+measurements+of+residual+crop+residue+and+phosphorus+effects+on+growth+and+composition+of+herbaceous+fallow+species+in+the+Sahel&rft.title=Plant+and+Soil&rft.issn=0032-079X&rft.date=2001&rft.volume=228&rft.pages=265-273&rft.issue=2&rft.genre=article