Cover crops are difficult up here, nothing will grow any more, it's been down to 20 degrees. To dry for anything to sprout anyhow.
I plant some with the oats in early spring, the clover had a tough time this year with the dry, some alfalfa came through, and the turnips did ok. Was just too dry for all thiat.
Just finished paging through my last Successful Farmer - they hadan Iowa stuy in there, turns out a 3 year rotation of corn, beansm and oats with colver was the most profitable over the long haul, beat out the typical corn/soy rotation. While they grossed less, they profited more.
Huh, here my old dumb ways might be right after all..... The neighbors can go ahead and laugh... :)