Everything is corn bean rotation, except for one piece that is on it's 3rd year beans. Did do more bean on bean this year due to being late for planting corn, those are actually some of our cleanest ones. Think part of issue is not getting them planted till June sometimes, then post spray in July and if it turns off dry takes them long time to grow out of burn from spray which means taking longer to canopy.
If we go back to them in few years going to make sure we can start planting them in April and go to 3 pass spraying.