The gang plow
-invented in the 1870s
-improved efficiency
-made of steel
The cast iron plow
-invented in 1797
-made of metal
-people thought it poisoned the soil.
The flying shuttle
-was patented by John Kay
-was patented in 1733
-turned soil
The corn picker
-made in 1850
-made picking corn faster
-put corn into a truck beside it
The spring tooth harrow
-smoothed the ground
-turned soil
-has flexible iron teeth
The grain elevator
-was a tower
-elevated grain
-done my a bucket
Combine
-originally pulled by horses
-next powered by steam
-harvests crops
Cotton Gin
-invented by Eli Whitney
-comb combed cotton
-removed seeds from cotton