1. Department of Soil Science and Land Resources, Faculty of Agriculture, Universitas Padjadjaran, Jatinangor, Indonesia
2. Research Center for Mining Technology, National Research and Innovation Agency, Bandung, Indonesia
3. Korea Mine Rehabilitation and Mineral Resources Corporation, Gangwon, South Korea
4. Department of Soil Science and Land Resources, Universitas Padjadjaran, Sumedang, West Java, Indonesia