Dr. Dhiraj Kumar was born on 19th March, 1987 at Hazaribagh district of Jharkhand. He did his B.Sc. Agriculture (Hons.) from UBKV, Pundibari, Cooch Behar (West Bengal) and M.Sc. as well as Ph.D. in Soil Science and Agricultural Chemistry from Indian agricultural Research Institute (IARI), New Delhi. He has already contributed nine research papers, six book chapters, three technical bulletins, research reports and popular articles published in journals of repute. His major area of interest is soil carbon and nitrogen dynamics studies. Presently, he is involved in studies on tree-crop interaction, soil biological parameters under conservation agriculture based agroforestry system, soil quality assessment in agroforestry based watershed interventions etc. At present Dr. Dhiraj Kumar is working as Scientist (Soil science) at ICAR-Central agroforestry Research Institute, Jhansi, Uttar Pradesh, India, with a major focus on fine roots and litter dynamics studies under agroforestry system.