The authors are grateful to D. Chessum who kindly allowed access to the plantation and maintained and applied water to the plantation. A number of people contributed to the design, establishment, maintenance and monitoring of the field study. The authors particularly thank J. Collopy, J. Morris, D. Stackpole and R. Stokes. They also thank K. Broadfoot and D. Cornwall from the Victorian Department of Primary Industries (Tatura) for instruction in the use of the EM38, and S. Yang for assistance with EM38 measurements.