sentences:  This plant exhibits autotoxicity, which means it is difficult for alfalfa seed to grow in existing stands of alfalfa.Therefore, alfalfa fields are recommended to be rotated with other species (for example, corn or wheat) before reseeding.Alfalfa is widely grown throughout the world as forage for cattle, and is most often harvested as hay, but can also be made into silage, grazed, or fed as greenchop.