Curious onlookers gravitated throughout the morning to the field just south of the Beck’s Hybrids main building at a mid-summer field day to catch a new technological advancement in action.

An electric spray drone took off roughly every 15 minutes and made a couple mock spray passes before perfectly landing back at its starting spot. It was a fascinating display that visitors to the Beck’s Hybrids 2022 Iowa Field Show north of Colfax raved...