There are a multitude of research needs regarding irrigation return flow quality, but only the specific research needs required to undertake an effective control program are described. These research needs include irrigation practices, soil-plant-salinity relationships, leaching requirements, prediction of subsurface return flow, cultural practices, irrigation scheduling, treatment of return flows, economic evaluations, and institutional control methods.

A collection of 14 proceedings for the Symposium on western water resources: coming problems and the policy alternatives, held in Denver, CO, USA, on the 27 Sep 1979.