1. Department of Land Management, Faculty of Agriculture, Universiti Putra Malaysia, Serdang, Malaysia
2. Faculty of Agriculture and Food Sciences, Universiti Putra Malaysia, Malaysia
3. Department of Agricultural Statistics, Faculty of Agribusiness Management, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh
4. Department of Soil Science, Faculty of Agriculture, Federal University, Dutse, Jigawa, Nigeria
5. Divisional Laboratory, Soil Resource Development Institute, Dhaka, Bangladesh