The four innovations in farming techniques that led to great productivity are:
Internal combustion engine: there were adapted to power horseless carriages and with the development of the gas tractor it was easily adapted to farming production. These tractors were very useful to plating and harvest as well, they did not need animals to function and reduced the human labor level in the sector.
Haber-Bosch process: The use of nitrogen produced by the Haber-Bosch process along with phosphorus and potash restored soil fertility and allowed for the continuous production of cash crops in a two or three crop rotation
Hybrid Corn Genetics: The projected yield for 2018 is 176.4 bushels/acre. In the intervening years, crop breeding based on improving understanding of the science of genetics has resulted in yield increases for all crops.
Farm Chemicals: with the development of synthetic insecticide the use of farm chemicals started to grow to control plant pests and diseases and reduce the farm labor as well helping the crop yields to grow steadily.