This simple, but brilliant, design actually pulls water from air through condensation. This solar- powered AirDrop low-tech device, takes in air from above the soil and cools it below ground, causing the water in the air to condense, in a passive system of sub-surface drip irrigation.
With this AirDrop device, the water is delivered directly to the plants' roots, where it's most needed and the water has much less opportunity to be wasted, due to evaporation.
The 28-year old Australian inventor, Edward Linacre took his biomimicry cues from Australia's hardy desert rhubarb and from the Namib beetle, which have evolved to collect water from the air.
It works by using a solar powered fan to drive the hot air underground through a network of piping that rapidly cools the air and condenses the water out it. This is the most ingenious and efficient form of irrigation, since it does not rely on the bodies of water for its sources. Currently, it's in the prototype phase.
While still in the beginning stages and not available for purchase... yet, this is an idea and a project to watch closely. Very closely. More detail