Mark Hosier, 58, uses a lift to get into a tractor on his farm in Alexandria, Ind., this month. Hosier was injured in 2006, when a 200-pound bale of hay fell on him while he was working. Assistive technology, help from seasonal hires and family members and a general improvement in the health of U.S. seniors in recent decades have helped farmers remain productive and stay on the job well into their 60s, 70s and beyond.
{}