I agree 100%. This has been argued a bunch on here. Pheasants go as the wheat goes in Kansas. When the wheat crop is good, with a timely hards are good. Mix in some draws and some decent pasture, and you will get some birds.
Wheat is the crop in Kansas and eastern Colorado and this has been established for years. Back when they strip farmed the high plains with alternated rows, and left the stubble up it was paradise. Nebraska did a study 20 years ago, ( that was before Pheasants Forever, before CRP, at the tail end of soil bank), determined the value of wheat crop in Kansas, but as you go north into Nebraska, alfalfa was the crop in sub-irrigated meadows, with the area around Alliance as the best, with over 300 birds per section. Now alfalfa is heavily sprayed, matures a lot earlier, we have haybines and disc mowers, which defeats the value of alfalfa. Later harvested good crop of wheat in the southern plains is golden. If there is tall prairie grass it's a benefit, but un-interrupted praire without burning, grazing, and disturbance, gradually looses it's capacity to carry pheasants, even looses it's charm on prairie chickens, after all they had buffalo and lightning strikes to refresh the prairie. Seems like a lot of this ground has been plowed, I doubt any marvels of nature we discover now will bring back the herds. We know the reasons, it takes a commercial change in the practice of farming to reverse the trend. At least pheasants are adaptable to reasonably small acreages, not like quail, where it takes a 32 section, ( a township), managed together to have a sustainable, huntable, population. Or disturbing a pasture with a fence, a road, or a shed, or an oil well, or a windmill, causes desertion of a range for prairie chickens, or sage grouse. The magnatude of that is overwhelming, and frankly hopeless. Much more compelling to me then a excercise semantics about percentages of grass. If grass it's self is the issue, raise up a Kentucky 31 fescue pasture, there lots of that in CRP, bought and paid for by us taxpayers, let it grow dense and flat, for years, there all over Michigan, Ohio, Illinois, and Missouri till they till they expire, and get plowed, tell me how many birds you have.... if you can walk in it, but there's lots of grass though, but nothing lives there but cotton rats, deer, and turkeys.