The correct answer is:
True
The "Steel plow" was created by John Deere in 1837, in Illinois. Wood plows couldn't plow the rich soil of the Middle-West without breaking. John Deere thought about it and was convinced that only a plow with mould board, made of good steel that isn't rusted would solve this problem. A single plow shank led to making a plow with more and more shanks to cover more ground which increased production.
The mechanical reaper created by Cyrus McCormick, was responsible for revolutionizing agriculture throughout the country. The mechanical reaper was used by farmers to harvest crops mechanically. This machine proved to be the answer for wheat farmers because it increased food production as well as made harvesting easier.