Department of Soil Science and Agricultural Chemistry, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, 221 005, Uttar Pradesh
*Corresponding author, email: ssinghssac@yahoo.co.in
**Presently at ICAR-IIVR, Shahanshahpur-221305, Varanasi, UP
Online published on 18 October, 2017.
