1. Natural Resource Ecology Lab. Colorado State Univ. Fort Collins CO 80523 USA
2. Institute for Future Environments Queensland Univ. of Technology Brisbane QLD 4000 Australia
3. SoilsWest, School of Agriculture and Environment (M079), Faculty of Science The Univ. of Western Australia 35 Stirling Highway Crawley WA 6009 Australia
4. School of Environmental Sciences Univ. of Guelph Guelph ON N1G 2W1 Canada
5. Dep. of Electrical and Computer Engineering Colorado State Univ. Fort Collins CO 80523 USA
6. Dep. of Agriculture Nutrition and Food Systems Univ. of New Hampshire Durham NH 03823 USA