Much of the water is used for irrigation .Farms in Kansas use central pivot irrigation (Figure 3), which is more efficient since water falls directly on the crops instead of being shot in the air. Whe...Much of the water is used for irrigation .Farms in Kansas use central pivot irrigation (Figure 3), which is more efficient since water falls directly on the crops instead of being shot in the air. When coastal aquifers are overused, salt water from the ocean may enter the aquifer, contaminating the aquifer and making it less useful for drinking and irrigation. The Ogallala Aquifer was filled in the ice age but is being used to irrigate the farms of the Midwestern U.S.
