Yeah, they say the land here in Nicollet County MN is some of the best to...I think they say that everywhere
We planted on a previous crop field( a couple years ago now)-one thing we noticed- after the crops come out, be sure to fertilize in the fall, your field will do better...the corn really depletes soil of the good stuff needs to grow. The areas we fertilized are doing way better then that not.
We went to our Co-op and bought a pasture mix for horses...it did contain a small percent of fescue- I did not want fescue either- but I found most all mixes in my area had a little (5%).
We planted ours in the spring, w/ oats as a shade crop using a seed drill..that worked real well. Then, because it was dry, the grass was coming up sparse, so we kept throwing more seed out but by hand. Then that fall, fertilized again...we were told that first fall after harvesting oats, after the first freeze, throw down more seed and it will germinate in the spring..but if you do it to soon, and it starts to grow and freezes at first frost, it will kill it.
It has taken us two years to go from corn fields to what we have now.....after all that time and work, we can finally let the horses out on it- after we bale it ..LOL ..I will try to post a photo one of these days...