Birdsfoot Trefoil (BFT) is a common legume species that should be considered for hay or pastures in NE MN as it has a few extremely valuable aspects that fit our region well. These aspects include its ability to grow in low pH soils, essential unless you have adjusted the pH, retention of quality, even when it gets over-mature, and finally, it is a non bloat causing legume. Here is a link to the complete article from Minnesota Crop News.