?url_ver=Z39.88-2004&rft_id=http%3A%2F%2Fdx.doi.org%2F10.1017%2FS0014479711000512&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=Alpha+Y.&rft.au=Kamara%2C+Alpha+Y.&rft.aulast=Kamara&rft.atitle=Phosphorus+And+Nitrogen+Fertilization+Of+Soybean+In+The+Nigerian+Savanna&rft.title=Experimental+Agriculture&rft.date=2011&rft.pages=1-10&rft.genre=article