?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=M&rft.au=Natarajan%2C+M&rft.aulast=Natarajan&rft.atitle=Sorghum-pigeonpea+intercropping+and+the+effects+of+plant+population+density.+2.+Resource+use&rft.title=The+Journal+of+Agricultural+Science&rft.issn=1916-9752&rft.date=1980&rft.volume=95&rft.pages=59-65&rft.issue=1&rft.genre=article