?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=S&rft.au=Ishikawa%2C+S&rft.aulast=Ishikawa&rft.atitle=Genotypic+variability+in+phosphorus+solubilizing+activity+of+root+exudates+by+pigeonpea+grown+in+low-nutrient+environments&rft.title=Plant+and+Soil&rft.date=2002&rft.volume=245&rft.pages=71-81&rft.issue=1&rft.genre=article