The original source of carbon in the roots is atmospheric carbon dioxide. Photosynthesis is a process which everyone has heard of, and probably studied at school, but I don’t think we fully realise and appreciate its uniqueness and value.
Farmers that implement sustainable land-management practices can improve the carbon levels of their soils, thereby moving carbon from the atmosphere through plants into the soil.
The carbon in plants is then transferred to the soil when plant roots and vegetation die and are incorporated into the soil by microorganisms in the soil.
The challenge for farmers is sieving through all these techniques at their disposal and finding that one technique which they understand and identify with – one which is simple and informative enough for them that they would be able to use the results and implement directed management practices on their farm.