@book{9540,
	author = {Sutradhar, G.N.C. and Chhonkar, P.K.},
	title = {Influence of crop residues and nitrification inhibitors of some soil enzymes and nitrogen utilization in rice-wheat cropping system /},
	publisher = {Division of Soil Science and Agricultural Chemistry,},
	year = {2009.},
	address = {Indian Agricultural Research Institute :},
	note = {Ph.D thesis of Division of Soil Science and Agricultural Chemistry, Indian Agricultural Research Institute, New Delhi, India. }
}