?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=A+R&rft.au=Sheldrake%2C+A+R&rft.aulast=Sheldrake&rft.atitle=Does+soil+cracking+reduce+pigeonpea+yields%3F&rft.title=International+Pigeonpea+Newsletter&rft.issn=0255-786X&rft.date=1983&rft.volume=2&rft.pages=34-35&rft.genre=article