The Earthquake tractor was there pulling a 15-bottom plow. Some of the ground was pretty hard and dry, but this area was a little better plowing. The Earthquake tractor is a 750 hp 4WD built by Dave & John Curtis of Rite Manufacturing Co. It is powered by a Detroit Diesel 12V and was built in the 1980s. It was named the Earthquake by its previous owners Doerfler Farms in Oregon when
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