US soybean: potential additional soil carbon sequestration (1996 to 2018).

	Annual increase in carbon sequestered based on 1996 average (kg carbon/ha)	Crop area (million ha)	Total additional carbon sequestered (million kg)	Total additional Carbon dioxide sequestered (million kg)
1996	0.0	26.0	0.00	0.00
1997	1.4	28.3	38.34	140.70
2000	5.2	30.1	156.72	578.18
2010	11.5	31.6	363.72	1,334.86
2015	12.2	33.1	405.15	1,486.89
2018	3.5	35.7	126.21	463.17
Total			5,753.22	21,114.30

Assumption: carbon sequestration remains at the 1996 level of −102.9 kg carbon/ha/year