In developed nations, at least in the cities and most towns, we take it for granted that when we turn on a tap, water will flow…. When we flip a switch, electricity springs to our command. However this is not the reality for many communities around the world, where water is from non-mains sources and electricity may be non-existent.
Conventional automatic irrigation systems are designed to operate with pressurised water from the mains, and are run by mains electricity, and because of this are not suited to implementation in areas where these are not available, whether due to being in an isolated location, or one without the financial ability to install such infrastructure as mains water and power.