Division of Soil Science and Agricultural Chemistry, Indian Agricultural Research Institute, New Delhi, 110 012
*Corresponding author (Email: bibhash.ssac@gmail.com)
1Present address: ICAR Research Complex for NEH Region, Umroi Road, Ri-Bhoi, 793 103, Meghalaya
2Present address: Krishi Anusandhan Bhavan-II, Indian Council of Agricultural Research, New Delhi, 110 012
Online published on 9 May, 2012.