Inventor of the first commercially successful steel plow Crossword Clue

 The answer to the crossword clue "inventor of the first commercially successful steel plow" is John Deere.

John Deere was an American blacksmith and manufacturer who founded Deere & Company, one of the largest and leading agricultural and construction-equipment manufacturers in the world. Born in Rutland, Vermont, Deere moved to Illinois and invented the first commercially successful steel plow in 1837.

Deere's plow was made of polished steel, which made it much more durable than the cast-iron plows that were commonly used at the time. The polished steel also made the plow less likely to stick to the soil, which was a major problem with cast-iron plows.

Deere's plow was a major breakthrough in agricultural technology. It made it possible for farmers to plow more land in less time, which led to increased crop yields and profits. Deere's plow also helped to open up new areas of land for farming, which contributed to the westward expansion of the United States.

Deere's company, Deere & Company, is still in business today and is one of the largest agricultural equipment manufacturers in the world. The company's products are used by farmers all over the world.