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Published September 12, 2012, 12:00 AM

Spirit driverless tractor


The “Spirit” driverless tractor from Autonomous Tractor Corp. drew a steady stream of curiosity-seekers at the 32nd Big Iron show in West Fargo, N.D., Sept. 11-13. Agweek photo by Mikkel Pates.
Read the article: Quiet 'Spirit'