Comment by malfist

I'm not sure any carbon is absorbed even by this metric. Unless were growing alfalfa and sequestering it below ground.

You should probably also consider inputs to growing that alfalfa too. Even single order inputs like transportation, fertilizer, water, etc would likely have more carbon release than the carbon mass of the alfalfa.

Is alfalfa even one of the plants that will nitrogen fix from the air? Or is it all pulled from the growing medium?