Answer:
John Deere invented the steel plow in 1837 when the Middle-West was being settled
Explanation:n 1837, Deere developed and manufactured the first commercially successful cast-steel plow. The wrought-iron framed plow had a polished steel share. This made it ideal for the tough soil of the Midwest and worked better than other plows. By early 1838, Deere completed his first steel plow.
Answer:
Explanation:
The United States advanced an open-door policy to promote free and open trade in China. The Open Door policy was an international trade agreement between the United States and several foreign nations over trade with China.