Pickaway County prosecutor Judy Wolford says Randall Turner entered the plea Friday. The 53-year-old Turner faces two to eight years in prison.
A tractor operator told sheriff's deputies Aug. 4 he'd been confronted by an angry man with a handgun while he mowed the edge of Turner's property in Ashville, 20 miles south of Columbus.
Turner says he fired the shots to disable the tractor. The operator wasn't hurt, but a bullet ricocheted and grazed Turner's forehead.
Turner sued the county in 2007, saying his property had been damaged by the mowing. The lawsuit was dismissed last week.
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