1. Division of Soil Science and Agricultural Chemistry, ICAR-Indian Agricultural Research Institute, New Delhi, India
2. Centre for Environment Science and Climate Resilient Agriculture, ICAR-Indian Agricultural Research Institute, New Delhi, India
3. Department of Soil Science and Agricultural Chemistry, Birsa Agricultural University, Kanke, India
4. Environmental and Biomedical Metrology Division, CSIR National Physical Laboratory, New Delhi, India
5. Radiocarbon and Stable Isotope Laboratory, Birbal Sahni Institute of Palaeosciences, Lucknow, India