Machines of the Farm: Theory and Practice is a comprehensive textbook designed to provide a thorough understanding of farm machinery, its mechanics, and management. It dives deeply into practical concepts related to agricultural equipment, including calibration and adjustments essential for agricultural engineers. By blending theoretical insights and practical applications, the book covers topics such as mechanics, materials, selection, and performance evaluation. Each chapter includes worked examples and exercises to ensure a broad and practical understanding of the subject. The book not only details specific machines and scientific principles but also includes chapters on primary and secondary tillage equipment, machinery for sowing, weed control, crop protection, manure application, and harvesting. It reviews the testing of farm machines, earth-moving equipment, and considers performance against cost. This textbook is a valuable resource for upper-level undergraduate and graduate students in Agricultural Engineering, as well as professionals in the field, farm machinery designers, and agricultural consultants. Additionally, it offers a full solutions manual for instructors and worked examples for students to further their learning objectives.