This text develops the principles of irrigation and farm irrigation system design in the context of their relationship to plant science, soil science, and fluid mechanics. Consideration of related material is worked into the text only as it is needed to develop an in-depth understanding of irrigation systems, a classroom-tested approach that improves student motivation and comprehension. The text describes the design of irrigation systems and the roles of the designer and landowner in the process, and covers all current irrigation practices as well as the components, layout, technical, and economic aspects of various systems and methods.