1. Soil Science Research Group, Agricultural Product Science Research and Development Office, Department of Agriculture, 50 Phahon Yothin Road, Chatuchak, Bangkok, 10900, Thailand
2. School of Earth and Environment, University of Western Australia, Crawley, 6009, Australia
3. Office of Science for Land Development, Land Development Department, Phahon Yothin Road, Chatuchak, Bangkok, 10900, Thailand