sentences:  The US was the largest alfalfa producer in the world by area in 2009, with , but considerable production area is found in Argentina (), Canada (), Russia (), Italy (), and China ().In the United States in 2014, the leading alfalfa-growing states were California, Idaho, and Montana.Alfalfa is predominantly grown in the northern and western United States; it can be grown in the southeastern United States, but leaf and root diseases, poor soils, and a lack of well-adapted varieties are often limitations.