I've been working with my power rake to do some contouring of the land and using it to form a swale. The power rakes sure are nice for some stuff, but they're expensive. I got mine at auction a couple of years ago for a few thousand dollars -- specifically for rehabbing pastures, like this one.
swale in the center.
It's not all altruism. The manure and runoff from the fields contains nutrients and fertilizer that I don't want to lose, and I certainly don't want the soil to be lost to erosion if there's ever bare dirt. A swale allows that dirt to settle out and kept on the property.
The soil test says that I need 3 tons of lime per acre to bring the acidity to pasture or some row crops, and I'll be applying that tomorrow, along with the grass seed. By next May or June I should have a very nice, perfectly level pasture with good stormwater handling built in.