The inventor associated with the development of the steel moldboard plow is?

• A. John Deere
• B. Thomas Edison
• C. Alexander Fleming
• D. Nikola Tesla

Answer: (A)

The ability to plow thick prairie soil efficiently came from using a steel moldboard, which reduces sticking and friction as the soil is turned. A skilled blacksmith in Illinois recognized that steel could withstand wear better than cast iron and designed a commercially viable steel moldboard plow in the 1830s, allowing farmers to work larger areas more quickly and deeply.

John Deere is the inventor associated with this breakthrough. His steel plow solved the problem of clayey, sod-heavy soils that would clog and wear out iron plows, enabling the expansion of farming into the Midwest. The other names listed are known for innovations in electricity and microbiology, not agricultural plowing.