Assertion: mineral's carbon | /r/HasProperty | returned to the atmosphere
Facets:
value: through the process of respiration
type: MANNER
Source sentences:
text: Organic carbon held in soil is eventually returned to the atmosphere through the process of respiration carried out by heterotrophic organisms, but a substantial part is retained in the soil in the form of soil organic matter; tillage usually increases the rate of soil respiration, leading to the depletion of soil organic matter.