Alfalfa, scientifically known as Medicago sativa, is a versatile and highly beneficial perennial legume that serves as an exceptional green manure crop. Renowned for its deep, extensive root system, alfalfa not only enhances soil structure but also contributes significantly to soil fertility through nitrogen fixation.
Key Features of Alfalfa Green Manure
- Deep Root System: Alfalfa's roots can penetrate over a meter deep, effectively breaking up compacted soil layers and improving aeration.
- Nitrogen Fixation: As a legume, alfalfa has the unique ability to convert atmospheric nitrogen into a form that plants can use, enriching the soil for subsequent crops.
- Drought Tolerance: Once established, alfalfa is resilient to dry conditions, making it a reliable choice in various climates.
- Soil Improvement: The organic matter from decomposed alfalfa enhances soil structure, increases water retention, and promotes healthy microbial activity.
- Biodiversity Promotion: Its vibrant flowers attract pollinators and beneficial insects, supporting a healthy ecosystem in the garden.
