Alfalfa makes a fantastic soil conditioner, and contains a complex assortment of 12 vitamins, multiple minerals, and 16 amino acids that improve overall soil and plant health. Alfalfa is also a great source of nitrogen. Microbacteria naturally present help aid in the decomposition of minerals in alfalfa meal. Rhizobacteria can further breakdown nutrients in alfalfa to make them readily available for use by the plant.