This guide is intended for use by individuals preparing for a career in commercial and residential irrigation. The materials included are geared toward students who have had some experience in the irrigation business; they are intended to be presented in 10 six-hour sessions. The first two sections deal with using this guide and preparing for the licensed irrigator's exam. The following topics are covered in the individual lessons: irrigation then and now; procedures for controlling water flow (water meters and cross connections, valves, controllers and electrical wiring); methods of controlling water placement (piping and sprinkler types and nozzles); layout and design (design basics, basics of hydraulics, and procedures for developing a design and checking it mathematically); drip irrigation; and irrigation considerations. Each lesson includes an overview, definition(s), instructional text, and a subject review exercise. Drawing and laboratory exercises are also provided. Appendixes contain the text of Texas's Licensed Irrigators Act and Permanent Rules for Irrigators, examples of local codes, common terminology of the turf irrigation industry, and an index. (MN)