I work out in the "flint hills" region of Kansas all year long, and fellas I'm here to tell you that these folks burn these regions yearly, by prescribed methods of course and these areas are some of the best looking hunting areas I've laid eyes on.
Iowa corn farms don't need to be burnt off yearly because the "farmer takes care of the rotation of "groceries" so to speak, but in areas that need burned are ares that no farmer can work them up, it has to be done naturally or as close to natural as can be expected.
Animals move right into these "burnt" areas immediatley when they "green-up" it's amazing what it offers otherwise barren type grounds.
just my buckfitty fellas!!