Thanks for all the people correcting my impression of Nebraska. I was west of Lincoln, which is apparently now all corn country, but I never saw it - of course, that was half a century ago and a lot can change . . .
Now, in my home state of Missouri, the southwestern edge is wheat country but the Ozark Mountains region is all orchards, some dairy pasturage and cornfields. And, notoriously, a percentage of the corn gets liquified into Moonshine and trucked up to Kansas City or across the state to Saint Louis. My grandfather made a living for a while right before and after WWII "running 'shine" - and made a lot more money at it than the wheat farmers were getting for their crop!
Speaking of which, now that they've got maize in the game, they've got to figure out a way to sneak an extra Amenity Resource in derived from it: Bourbon. Maybe a new City State named Lynchburg . . .
And yet another thought: the Native American Agriculture basis was the 'Three Sisters" of Maize, Squash and Beans. Should they ever include another NA Civ (Haudenosenee, anyone?) it would be nice to see a nod to the special properties of that distinctly Non-European, Non-Old-World agricultural system included.