I hacked together this little mod from a Blue Marble photo of Kansas. Personally, I think it looks good in the Modern Era, but farm crop graphics don't change the same way the barns do as time passes. Maybe someone could write a Python script for that?

They look pretty good but they look too futuristic for my liking...when you can make it so the farm design changes each era then this one could be the last era (I think it is called the future era).

The farms look great for the modern era, but I agree that they'd have to change between eras to work well.

Looks nice yes :)