Table 3 SOC sequestration to 30Â cm depth by tillage sequence relative to expected cost for geologic CO2 storage
From: What might it cost to increase soil organic carbon using no-till on U.S. cropland?
Upper and lower marginal cost for geologic CO2 storage ($Mg−1CO2) | Tillage sequencea considered in model | Total | |||||
|---|---|---|---|---|---|---|---|
CTCTNT | CTRTNT | RTCTNT | RTRTNT | NCCTNT | NCRTNT | ||
SOC storage (Tg CO2 year−1) |  | ||||||
 < $36.36 | 75.1 | 4.2 | 0.00 | 0.1 | 9.0 | 0.7 | 89 |
 < $86.06 | 95.7 | 19.1 | 0.02 | 0.8 | 11.7 | 2.5 | 130 |
Proportion of SOC storage for less than the MC | Â | ||||||
 < $36.36 | 84.3% | 4.7% | 0.00% | 0.1% | 10.1% | 0.8% | 1 |
 < $86.06 | 73.7% | 14.7% | 0.02% | 0.6% | 9.0% | 1.9% | 1 |
Proportion of total annual potential SOC storage (2803 Tg CO2) | Â | ||||||
 < $36.36 | 53.5% | 3.0% | 0.00% | 0.1% | 6.4% | 0.5% | 63.5% |
 < $86.06 | 68.2% | 13.6% | 0.02% | 0.6% | 8.4% | 1.8% | 92.6% |