Pricey holiday sweets? Why sugar outpaces grocery inflation.

With five trucks and a tractor to his left and a sea of leafy green before him, Dean Haubenstricker lines up his harvester and starts it forward. The high-tech machine digs up brown sugar beets, lops off their tops, and conveys them to an onboard storage bin. 

Mr. Haubenstricker’s son Josh arrives alongside with the tractor and a trailer, allowing his father to discharge his beets even as he continues to harvest, and then shuttles them to a waiting truck, which whisks them off to storage. It’s as elegant and efficient a harvest as one will see in American industrial agriculture.

And this harvest, Mr. Haubenstricker’s