R. Verma, M.Sc., Ph.D. (P), ICAR-ASRB-NET, ICAR-SRF, IASc, Banaras Hindu University, Varanasi. Email: raj80v@gmail.com, S.K. Pandey, M.Sc., Ph.D. (P), CSIR-SRF, Centre of Advanced Study in Botany, Banaras Hindu University, Varanasi,Dr. W.P. Badole, Prof. in Soil Science and Agricultural Chemistry, College of Agriculture, Nagpur (M.S.), (India)