The eastern U.S. generally gets enough rain; however, there is not always enough during vital stages of crop growth. Trickle systems ensure that plants have adequate water at all times, and require less water, energy and labor than other systems. This 24-page booklet covers system components and planning details, as well as guidelines for irrigating different kinds of crops. Includes information about water requirements, emitters and irrigation time, designing laterals and submains, and preventing line clogging. 1985.