Sentences with phrase «of irrigation water never»
Data on water irrigation efficiency for surface water projects — that is, dams that deliver water to farmers through a network of canals — show that crop usage of irrigation water never reaches 100 percent simply because some irrigation water evaporates, some percolates downward, and some runs off.
http://www.earthpolicy.org/ Not exact matches
As Trout Unlimited's Denison points out, flood irrigation is just 35 percent efficient, meaning nearly two - thirds of the water taken out of the river is lost, and never gets used by the grasses it is meant to nourish.