John Deere invented the steel plow in 1837 when the Middle-West was being settled. The soil was different than that of the East and wood plows kept breaking.
Research important agricultural inventions using these resources
- A History of Ag Research
- A History of American Agriculture: Farm Machinery and Technology
- A Timeline of Tractors
- Agriculture: It Doesn't Just Happen
- Agriculture in Motion
- The History of Ethanol in America
- Timeline of the Land
- Unearthing the Facts
- Bones and Stones
- Illinois mAGic Kit Lesson to compliment ‘The Inventors Secret’
- Illlinois Soybean Ag Mag with links to Henry Ford
- Illinois Corn Ag Mag with links to Ethanol
- Inventor’s Secret video
- Illinois History Ag Mag
- Growing a Nation
- Top Ten Agricultural Inventions that Changed Farming
- Illinois Inventions you wouldn't want to live without