1. Department of Soil and Water, University of Adelaide, Waite Campus, PMB 1, Glen Osmond, South Australia 5064, Australia;
2. The Centre for Plant Root Symbioses, University of Adelaide, Waite Campus, PMB 1, Glen Osmond, South Australia 5064, Australia
3. Department of Environmental Biology, University of Adelaide, South Australia 5005, Australia;
4. BiometricsSA, University of Adelaide, Waite Campus, PMB 1, Glen Osmond, South Australia 5064, Australia;
5. BiometricsSA, SARDI, GPO Box 397, Adelaide, South Australia, 5001, Australia;