Iowa cornfields have looked the way the way they do for hundreds of years. Tall stalks of corn. There were modifications through the years. The one notable difference was when stalks started showing up with multiple ears of corn. That may have been a result of hybrids where the primary ear was damaged, failed, or didn't pollinate properly. Other than that not much has changed when it comes to height, but that is all about to change if Bayer has anything to say about it.