?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=M+V+K&rft.au=Sivakumar%2C+M+V+K&rft.aulast=Sivakumar&rft.atitle=Effect+of+year+and+fertilizer+on+water-use+efficiency+of+pearl+millet+(Pennisetum+glaucum)+in+Niger&rft.title=Journal+of+Agricultural+Science&rft.issn=0021-8596&rft.date=1999&rft.volume=132&rft.pages=139-148&rft.issue=2&rft.genre=article