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Table 3 SOC sequestration to 30 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  
 < $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)  
 < $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%
  1. aCTCTNT = Conventional tillage (CT) in 1982, CT in 1997 and no-till (NT) in 2017; CTRTNT = CT in 1982, reduced tillage (RT) in 1997 and NT in 2017; CTNTNT = CT in 1982, NT in 1997 and NT in 2017; RTCTNT = RT in 1982, CT in 1997 and NT in 2017; RTRTNT = RT in 1982, RT in 1997 and NT in 2017; RTNTNT = RT in 1982, NT in 1997 and NT in 2017; NCCTNT = Non-cropland (NC, e.g., hay, pasture, etc.) in 1982, NT in 1997 and NT in 2017; NCRTNT = NC in 1982, RT in 1997 and NT in 2017; NCNTNT = NC in 1982, NT in 1997 and NT in 2017