?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=A&rft.au=Bationo%2C+A&rft.aulast=Bationo&rft.atitle=Rotation+and+nitrogen+fertilizer+effects+on+pearl+millet%2C+cowpea+and+groundnut+yield+and+soil+chemical+properties+in+a+sandy+soil+in+the+semi-arid+tropics%2C+West+Africa&rft.title=Journal+of+Agricultural+Science&rft.issn=1469-5146&rft.date=2000&rft.volume=134&rft.pages=277-284&rft.issue=3&rft.genre=article