James Small invents the iron plow in England. Eli Whitney invents the cotton gin, Thomas Jefferson a moldboard for the plow. Cyrus McCormick invents the grain reaper. Grain combine is patented. S.S. Rembert and J. Prescott develop a mechanical cotton-picking machine.
Barbed wire is invented.
First gasoline tractor is built by John Froelich. Mechanical tomato harvester is developed.