Alfalfa loss? Annual ryegrass is a win. In the U.S., alfalfa is grown mainly in western and northern states. The cold winters and other factors can lead to losses for farmers and forage shortages. Researchers have identified annual forage crops that can be cultivated in fields with winter-killed or terminated alfalfa. Source 4s.
This is going to hit dairy farmers pretty hard. Dairy animals have high dietary needs and high quality forage with a high protein content is necessary for a good yield.