MODERN TRENDS IN AGRONOMY By Dr. A. Ramachandran Assistant Professor, Department of Agronomy, Mother Terasa College of Agriculture, Mettusalai, Illuppur (Po), Pudukkottai - 622102. Tamil Nadu, India E-mail :
[email protected] Dr. M. Mohana Keerthi Assistant Professor, Department of Agronomy Mother Terasa College of Agriculture, Mettusalai, Illuppur (Po), Pudukkottai - 622102. Tamil Nadu, India E-mail :
[email protected] 2019 Ideal International E – PublicationPvt. Ltd. www.isca.co.in 427, Palhar Nagar, RAPTC, VIP-Road, Indore-452005 (MP) INDIA Phone: +91-731-2616100, Mobile: +91-80570-83382 E-mail:
[email protected], Website:www.isca.co.in Title: MODERN TRENDS IN AGRONOMY Author(s): Dr. A. Ramachandran, Dr. M. Mohana Keerthi Edition: First Volume: I © Copyright Reserved 2019 All rights reserved. No part of this publication may be reproduced, stored, in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, reordering or otherwise, without the prior permission of the publisher. ISBN: 978-93-86675-86-6 MODERN TRENDS IN AGRONOMY iii Preface The field of agricultural science in general and agronomy in particular has achieved many milestones worldwide in 21st century. Our country is no exception in development of crop production science keeping in pace with technological developments in other branches of science. There is continuous change in technology i.e. from local varieties to high yielding varieties, hybrids and genetically modified crops and varieties; simple fertilizers to complex fertilizers and nano fertilizers; mono cropping to cropping system and farming system approach etc. There are many discussions on conservation agriculture, organic farming, sustainable development, climate change, etc in these days.