?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=K+L&rft.au=Sahrawat%2C+K+L&rft.aulast=Sahrawat&rft.atitle=Assessing+the+Fertilizer+Phosphorus+Requirement+of+Grain+Sorghum&rft.title=Communications+in+Soil+Science+and+Plant+Analysis&rft.date=1999&rft.volume=30&rft.pages=1593-1601&rft.issue=11%2F12&rft.genre=article