?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=Leaf+phosphorus+and+sorghum+yield+under+rainfed+cropping+of+a+Vertisol&rft.title=Nutrient+Cycling+in+Agroecosystems&rft.date=1999&rft.volume=54&rft.pages=93-98&rft.issue=1&rft.genre=article