?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aufirst=V&rft.au=Nageswara+Rao%2C+V&rft.aulast=Nageswara+Rao&rft.date=2011&rft.title=Long-term+evaluation+of+dryland+cropping+systems+intensification+for+sustainable+production+in+the+semi-arid+tropics+of+India&rft.genre=proceeding