?url_ver=Z39.88-2004&rft_id=1009&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Robbins&rft.au=Robbins%2C+C.W.&rft.aufirst=C.W.&rft.atitle=Organic+phosphorus+source+effects+on+calcareous+soil+phosphorus+and+organic+carbon&rft.title=Journal+of+Environmental+Quality&rft.date=2000&rft.volume=29&rft.pages=973-978&rft.genre=article