I have read several books that have included accounts of some of the earliest expeditions into the interior. One account of an expedition who got lost in a corn field for 2 days and couldn't find their way out until they sent out scouts who then had a difficult time even re-finding the expedition and finally they found the Indians. Thousands of them. That's a serious big corn field. They would clear huge expanses of land moving around constantly because the ground would become infertile after a couple growing seasons. Which we are all familiar with the reasons for that but their answer was to just move.