?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Munkholm%2C+L.J.&rft.aulast=Munkholm&rft.aufirst=L.J.&rft.date=2003&rft.title=Mechanical+subsoiling%3A+Mitigation+of+recompaction+by+light+traffic+and+on-land+ploughing&rft.genre=proceeding