Palaniappan, S.P. . Cropping systems in the tropics : principles and management / by S.P. Palaniappan; K. Sivaraman. - 2nd ed / - New Delhi : New Age International (P) Limited , 1996 - xii, 211p : ISBN: 81-224-0667-X Subjects--Topical Terms: Cropping Dewey Class. No.: J:5:3.192 / N6