Alfalfa as lawn and garden fertilizer

The farm supply store was included in my stops yesterday where I picked up a bag of alfalfa pellets.  I don't have horses, but I do have a lawn.  Alfalfa contains nitrogen and in lieu of commercial chemical fertilizers, I broadcast spread the alfalfa on the lawn.  I'm anxious to see how this works, and expect it to take some time as the microbes feed on the alfalfa.