At present, there is no comprehensive text book on agriculture science and applied aspect suitable for farmer. This book entitled, "hand book of agriculture "will provide comprehensive information on the subject matter and fulfill the need of student and other professionals. This book makes an attempt to present the available information on the modern concepts of agriculture research and advanced principal in crop production easily understandable manner. This book will serve as text book for student of agronomy, agro-meteorology, agriculture engineering, economics, veterinary, social science, a reference for research scientists and teachers in the areas of crop production, integrated farming system, production technology management under different situations, changing climate and food and nutrition security under Indian economy.