I would like to compare the expected TOC/SOC amount from soils to the amount that I have observed in subterranean habitats which is ~0.15-1.8% dry weight.
Mara, your question is in tune with latest attraction on soil quality assessment and subjected to loss of soil carbon in response to ongoing climate change issue. Therefore , triggering carbon sequestration by the soils is the call of the day in modern Soil Research . Organic carbon and its distribution either horizontally or vertically in a given soil type is the signature of the soil quality . I am enclosing some very interesting PDfs for your further studies . Hope , you find them very useful .