1. School of Agriculture, Food & Wine; Waite Research Institute, Waite Campus, The University of Adelaide, Waite Road; Adelaide South Australia 5064 Australia
2. Department of Soil, Faculty of Agriculture, Lambung Mangkurat University, Achmad Yani Street; Banjarbaru 70714 Indonesia
3. CSIRO Land and Water; Private Bag 2 Adelaide South Australia 5064 Australia
4. Soil Sciences; Martin Luther University Halle-Wittenberg; von-Seckendorff-Platz 3 06120 Halle Germany