This book has been specifically written to fulfill the academic requirements of students studying Agricultural Engineering and Farm Machinery and Power Engineering. It has been prepared with the ARS-NET syllabus of Farm Power and Machinery discipline in mind, and contains a comprehensive collection of important points on farm machinery, farm power, ergonomics, theory of machines, energy in agriculture, instrumentation, and workshop technology. The book serves as a valuable resource for students preparing for various competitive exams, including ICAR JRF/SRF, NET, ARS, and GATE. It also includes a section on key notes that provide an overview of important terms related to farm machinery and power engineering, which can aid in a better understanding of the subject.