Explanation:

Alfalfa also called Lucerne, is a perennial flowering plant in the pea family “Fabaceae” cultivated as an important forage crop in many countries around the world. It is used for grazing, hay, and silage, as well as a green manure and cover crop. The name alfalfa is used in North America. Because of its importance among forage crops, alfalfa (Medicago sativa L.) is referred to as "Queen of Forages". Lucerne is another name sometimes used for this species which evolved and was first used in Iran.