The textbook Principles of Organic Farming provides extensive and comprehensive information on various aspects of organic farming, including its definition, characteristics, and fundamental principles. The book also covers the history of organic farming and the initiatives taken to promote organic agriculture, as well as the concepts of organic ecosystems, nutrient management, weed management, insect management, and disease management. It also delves into the requirements for organic production, national programs for organic production and certification, and food processing and handling. Additionally, the book covers organic postharvest handling, economic considerations, marketing, and export of organic products, organic farming in dryland areas, integrated organic farming systems, and good agricultural practices and their strategies. The book also includes lessons learned from organic farming.