What to Seed in a Wetter Soil

I have the opportunity to make hay on about 25 acres of a heavy, wetter type soil.  It is near an area watershed and some of it hold water after any significant rain.  Right now it it has a combination of fesuce, johnshon grass, and some clover. I would like to have something that will stand up to the wetter, heavier soil, but also make good tonnage.  This will be round baled and feed to cows, so I don't have to deal with horse people's taste on these acres.

 

Thanks

What to Seed in a Wetter Soil