1. College of Agricultural, Life, and Physical Sciences Southern Illinois Univ. Carbondale IL USA
2. Faculty of Forestry/Faculty of Land and Food Systems Univ. of British Columbia Vancouver BC Canada
3. Earth Sciences Museum Alexis Dorofeef, Dep. of Soils Federal Univ. of Viçosa Minas Gerais Brazil
4. Sydney Institute of Agriculture School of Life and Environmental Sciences Univ. of Sydney Sydney Australia
5. School of Water, Energy and Environment Cranfield Univ. Cranfield UK
6. Research Faculty of Agriculture Hokkaido Univ. Hokkaido Japan