US soybeans: permanent reduction in tractor fuel consumption and reduction in carbon dioxide emissions (1996–2018).

	Annual reduction based on 1996 average (liters/ha)	Crop area (million ha)	Total fuel saving (million liters)	Carbon dioxide (million kg)
1996	0.00	25.98	0.00	0.00
1997	0.41	28.33	11.60	30.98
2000	1.41	30.15	42.58	113.69
2010	3.22	31.56	101.75	271.67
2015	3.36	33.12	111.44	297.53
2018	1.10	35.66	39.23	104.75
Total			1,614.59	4,310.96

Assumption: baseline fuel usage is the 1996 level of 36.6 liters/ha