The Plow That started it all, 1838
The walking plow was hitched to a team of horses or oxen which pulled the plow and penetrated the ground deep enough to completely turn the topsoil upside down.
Someone walked behind, keeping both hands on the two handles to guide the team and keep moving in a straight line. It took some training for man and beast. John Deere was a blacksmith in Grand Detour, Illinois. His first plow, The Walking Plow using molded steel, instead of cast iron, was made in 1838. This newer model likely came to Fallbrook many years later.
Read the Wikipedia article for more information on plows.