In a conquered territory, the AI has built lots of mills and there are wheat fields all over the place. Now, even with the mills gone, the fields remain, and I cannot build on top of them. Not only do they hog a lot of strategic space, they are damned unsightly. Even after more than an hour's worth of harvesting with 50 peasants on a single wheat field, however, it has not diminished at all. What gives?

You cannot remove them and that is it.

This is if we are talking about the original anthology as I have little to no experience with C II and C 3.

Well, that sucks. I had a suspicion that might be the case. The funny thing is that when you first do build a mill, that field will deplete if you have 15-20 peasants working on it. They re-sow empty patches, but fields do deplete. And there's even a tech to improve field capacity (which does not result in more patches of wheat).

But conquer someone else's farms, and you're stuck with them, apparently.

capture peasant AI