<Table> <Tr> <Th> Major Crops in the USA </Th> <Th> 1997 ( in US $ billions ) </Th> <Th> 2014 ( in US $ billions ) </Th> </Tr> <Tr> <Td> Corn </Td> <Td> $24.4 </Td> <Td> $52.4 </Td> </Tr> <Tr> <Td> Soybeans </Td> <Td> $17.7 </Td> <Td> $40.3 </Td> </Tr> <Tr> <Td> Wheat </Td> <Td> $8.6 </Td> <Td> $11.9 </Td> </Tr> <Tr> <Td> Alfalfa </Td> <Td> $8.3 </Td> <Td> $10.8 </Td> </Tr> <Tr> <Td> Cotton </Td> <Td> $6.1 </Td> <Td> $5.1 </Td> </Tr> <Tr> <Td> Hay , ( non-Alfalfa ) </Td> <Td> $5.1 </Td> <Td> $8.4 </Td> </Tr> <Tr> <Td> Tobacco </Td> <Td> $3.0 </Td> <Td> $1.8 </Td> </Tr> <Tr> <Td> Rice </Td> <Td> $1.7 </Td> <Td> $3.1 </Td> </Tr> <Tr> <Td> Sorghum </Td> <Td> $1.4 </Td> <Td> $1.7 </Td> </Tr> <Tr> <Td> Barley </Td> <Td> $. 9 </Td> <Td> $. 9 </Td> </Tr> <Tr> <Th> Source </Th> <Th> 1997 USDA - NASS reports , </Th> <Th> 2015 USDA - NASS reports , </Th> </Tr> </Table>
what are the main crops grown in the united states
Corn Soybeans Wheat Alfalfa Cotton Hay Tobacco Rice Sorghum Barley