In order to save agricultural water, the famous FAO's "more crop per drop" has been taken literally in many arid or semi-arid places around the world and policies that aim improving "efficiencies" (irrigation efficiency ...) have been implemented, very often leading to the promotion of water saving technologies
Feltz, N., & Vanclooster, M. (2015). “More drop per crop” when moving from gravitational to drip irrigated agriculture? Expériences from a North Moroccan case study. In Ann Verdoodt, Donald Gabriels, Marnik Vanclooster, Willy Bauwens (ed.), Book of abstracts (p. p. 57). https://hdl.handle.net/2078.5/190246