Majeti Narasimha Vara Prasad is an Emeritus Professor, School of Life Sciences, University of Hyderabad, India. He has published over 219 papers and edited 34 books. He received a Doctorate in Botany from Lucknow University, India in 1979. Dr. Chitranjan Kumar (MSc Gold Medallist, NET, D.Phil.) is a faculty member of Amity University and a well-known international soil scientist in the field of phyto-bio-remediation/management of sewage-irrigated soils/organic fertigation.