Relative efficiencies of different irrigation types. A percentage efficiency of 90% means that 90% of irrigation water will reach the plants root system with only 10% subject to evaporation.
Which System?
Irrigation efficiency depends upon a number of factors. In general the smaller the droplet size and the lnger the droplets remains in the air and/or on the surface, the less efficient the system will be.
...some are wasting over 50% before the plant can have a drink.