We are grateful to the Science & Engineering Research Board (SERB)-Department of Science & Technology, Government of India for funding through the project entitled ‘Identification of key indicators and establishment of their critical limits in assessing soil health under different agro-ecological regions of India’ under Early Career Research Award Scheme (ECR/2017/002908). The PI is grateful to the Director, ICAR-Indian Agricultural Research Institute, New Delhi and Head, Division of Soil Science and Agricultural Chemistry, ICAR-IARI, New Delhi for providing necessary facilities to carry out the project work.