1. Cooperative Research Centre for Sustainable Production Forestry; Griffith Univ.; Nathan Qld. 4111
2. Australia and Faculty of Environmental Sciences; Griffith Univ.; Nathan Qld. 4111 Australia
3. Queensland Forestry Research Institute; P.O. Box 631 Indooroopilly Qld. 4068 Australia
4. School of Agriculture and Horticulture, Univ. of Queensland; Gatton Qld. 4343 Australia