Table 2.

Area harvested and total production in 2018 for the three top producing states in the United States and the average yield gap from 1950 through 2018 and the area harvested and total production for the top three producing counties in Kansas and the average yield gap from 1950 through 2007.

State	County	Area harvested in 2018 (ha)	Production in 2018 (metric tons)	Yield gap (1950–2018)
Kansas		3,116,021		0.22 (0.03)
	Mitchell	82,069	187,653	0.36 (0.05)
	Saline	61,794	62,336	0.25 (0.04)
	Sumner	161,467	184,600	0.29 (0.05)
North Dakota		3,130,185	10,020,199	0.24 (0.03)
Washington		8,933,855	4,277,552	0.17 (0.02)

Data extracted from the National Agricultural Statistics Service (www.nass.usda.gov). Standard errors are shown in parentheses.