Alfalfa "Queen of the Forage Crops" is one of the most important forage legumes grown in the US. It can be grown over a wide range of soil and climatic conditions, it has the highest yield potential and the highest feeding values of all adapted perennial forage legumes. Alfalfa is a versatile crop which can be used for pasture, hay, silage, green-chop, soil improvements and human consumption (sprouts, etc.).
Lacefield, Garry D., "Alfalfa Hay Quality Makes the Difference" (1988). Agriculture and Natural Resources Publications. Paper 32.