What used seed slope

Alfalfa: Alfalfa is a perennial legume plant roots directly, taproot well developed, with a nodule symbiosis features to fixed nitrogen in the air, very drought, cold resistance and barren soil, can improve soil physical and chemical properties, improve soil fertility, can form stolons, open beautiful purple flowers. Commonly used for farming and pasture slope with grass seeding rate of 5-10g / m2.