Alfalfa is the most important forage legume in the U.S. Grown over a wide range of soil and climatic conditions, it has the highest yield potential and feeding value of all perennial forage legumes.

Hay is one of the most versatile of stored forages in that it can be kept for long periods of time with little loss of nutrients if protected from weather; a large number of crops can be successfully used for hay production; it can be produced and fed in small or large amounts; it can be harvested, stored and fed by hand or the production and feeding can be completely mechanized; and hay can supply most nutrients needed by many classes of livestock.