T. Yellamanda Reddy Principles of Agronomy - Ludhiana Kalyani Publishers 1992 - 527p T. Yellamanda Reddy & G.H. Shankara Reddi: Principles of Agronomy. Ludhiana. Kalyani Publishers, 1992. 81-272-0282-7--(630YEL) ENGLISH ISBN: 81-272-0282-7 Dewey Class. No.: 630 / YEL