This document discusses the use of drone technology for precision agriculture applications such as crop health monitoring and pesticide spraying. It begins by defining agricultural drones and their components. The main types of agricultural drones are then described: fixed-wing, helicopter, and multi-copter. Examples of how drones can be used for crop health monitoring through sensors and data collection are provided. The document also discusses pesticide spraying applications of drones and reviews some literature on these topics. Challenges and the future of agricultural drone technology are outlined.