1. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation Northwest A & F University Yangling Shaanxi PR China
2. School of Life Sciences, Faculty of Science University of Technology Sydney Australia
3. New South Wales Department of Planning Industry and Environment Parramatta New South Wales Australia
4. School of Geography Beijing Normal University Beijing PR China
5. New South Wales Department of Primary Industry Parramatta New South Wales Australia