Function of carbon in organic fertilizers.

Is this a chemistry question? Carbon is the basic element in the molecules of living things. As we know it, without carbon there would not be life, not even bacteria or viruses. DNA molecule strains require carbon as the basic building block. Many "inorganic fertilizers" are salts (such as potassium nitrate) that do not contain carbon atoms. The carbon atom is very unique, both physically and the way it reacts with itself and chemically with other atoms. Diamonds, graphite, charcoal are all carbon atoms, just arranged differently. Use Google to find lots of information. Of course nothing here has much to do with "organic gardening."