P. Balasubramaniyan Principles and Practices of Agronomy - India Agrobios 2001 - 586p P. Balasubramaniyan & SP. Palaniappan: Principles and Practices of Agronomy. India. Agrobios, 2001. 81-7754-052-1--(630BAL) ENGLISH ISBN: 81-7754-052-1 Dewey Class. No.: 630 / BAL