Abstract: A sprinkler structure for use in agricultural and horticultural applications can be constructed so that it includes a support having a resilient arm structure for holding a distribution member so that the distribution member can be easily removed from and replaced on the support. This makes it possible to easily remove and replace the distribution member for cleaning purposes. It also makes it possible to easily substitute one distribution member for another when a change in distribution members may be desired.

Abstract: A desirable emitter for use in drip irrigation can be constructed so as to utilize an elongated member formed of a flexible, resilient material so as to include at least one and preferably a number of internal ribs or projections which prevent the interior of the member from being closed off or pinched shut as it is deformed or flexed. Such a member is normally mounted so as to extend into an enclosed space such as the interior of an irrigation tube or conduit in such a manner that water can flow from the interior to the exterior of the space through the member. The liquid within the space can be controlled so as to exert a force against the exterior of the emitter causing it to be deformed or flexed in such a manner as to vary the flow through the member.