@book{25256,
	author = {Reddy, T. Yellamanda  and Reddy, G.H. Sankara },
	title = {Principles of agronomy/by T. Yellamanda   Reddy and G.H. Sankara Reddy},
	publisher = {Kalyani Publishers,},
	year = {2016.},
	address = {Ludhiana:},
	edition = {5th. rev. ed.}
}