Most memorable 'spot' of my pheasant hunting career involved a couple acres of that stuff. Three years ago the field was milo, then it was converted to CRP the next year, and last year there was a ton of that weed growing up in a corner of the field, maybe 2 acres, between the road, waterway, and railroad tracks.
Needed 1 bird to finish the opening day limit, it was almost noon. Parked the truck, drank a coke, ate an oatmeal cream pie, shot the bull for a second, then crossed the ditch, one step over the broken down fence, and all hell broke loose. If one bird got up out of there, I bet 80 did. Not all at once either, 4 or 5 at a time. So many were getting up I couldn't concentrate, took 4 shots before I dropped the first rooster that jumped, probably 50 yard shot, having scratched him the first 3 shots. I took a good mark on him and marched in the best straight line I could, worrying I wouldn't be able to find him. Luckily, my mark was good and he fell in a couple square foot area that was bare. Good times for sure.