Sarah R. Noack, School of Agriculture, Food & Wine - Soils Department, The University of Adelaide, Glen Osmond, Australia, Ronald Smernik, Soil Science, The University of Adelaide, Glen Osmond, Australia, Therese McBeath, Ecosystem Sciences, CSIRO, Glen Osmond, Australia, Roger Armstrong, Department of Primary Industries Victoria, Horsham, Australia and Michael McLaughlin, University of Adelaide, Glen Osmond, Australia