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Land irrigated with onfarm pump water increased by more than 5 million acres from 1974 to 1977. Energy costs to pump the water increased from $570 million to more than $1 billion during the period. Yet increased costs failed to slow pump irrigation. Electricity was used most to power pumps for irrigated acreage, followed by natural gas, diesel, liquified petroleum gas (LPG), and gasoline. Diesel used to pump irrigation water about doubled from 1974 to 1977, with modest increases for electricity and natural gas. The use of LPG and gasoline declined.


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