The chemical composition of biochar provides the principal explanation for its generally high
level of stability and is reflected in broad terms by its elemental composition: highly aromatic
and with a very high carbon content. It is likely that its stability is strongly modified by its
physical properties and structure, however. If the biotic and abiotic processes determining
the fate of biochar are the same as those for other soil organic matter, higher soil
temperature, moisture availability, lower clay content and intensive tillage will accelerate
decomposition rate.