Those bubbles would not stand up to a good wind around here. Plus it would take hundreds, if not thousands, to cover the average acreage around here. Corn fields in the Midwest are enormous. And why turn on a fan, which costs electricity, when if you just leave the corn exposed and let the wind blow it does it for free? Also, those bubbles appear to be somewhat opaque, and that would reduce the sunlight striking the leaves and make for less photosynthesis, to which the plants would respond by putting more energy into bigger leaves and less left over for making seed. So not a good idea overall.

If you don't care for reality, just wait a while; another will be along shortly. --A Rose