Idaho ranks fourth nationally for production of alfalfa hay. Production has increased in recent years to meet the demand of Idaho's burgeoning dairy industry. Production in the east and south-central areas lead the state. Jefferson County with 80,700 acres of alfalfa is the leading county in the state.
Statewide, growers harvested 1 million acres in 2011 (the latest year in which statistics are available). The average yield was 4.3 tons per acre.
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