I watch in awe as my small-framed, five-foot, seven-inch daughter drives our John Deere 8345R, pulling the 1,050-bushel grain cart like it’s her business. Which is good because that was her job ...

But the first time the 19-year-old stood inside the two aluminum tin grain bins that her dad, Shane, built on their property in Alabama, she couldn't help but see their house as anything else.

To commemorate its 50th anniversary of the Kinze grain cart, the manufacturer did a national search to find the oldest units still running. After he built the first prototype cart in 1971 ...