1. Graduate School of Agricultural Science, Hasanuddin University, Makassar, Indonesia
2. Department of Soil Science, Faculty of Agriculture, Hasanuddin University, Makassar, Indonesia
3. Department of Physics, Faculty of Mathematics and Natural Science, Hasanuddin University, Makassar, Indonesia
4. Centre for Regional Development and Spatial Information WITaRIS, Hasanuddin University, Makassar, Indonesia