it is called ditch hay Very popular here in southern MN You have the rights to the ditch on your land. I let my neighbor have my ditch. he gets three nice alfalfa bails each cut. Yes alfalfa, rural water stuck a 10 inch water main in the ditch and replanted with alflafa. not the best cover crop. It is funny to see all the bales along the highways. Ditch hay will be valuable this year. Drought