Plow
A plow or plough is a tool or machine used for several jobs, including farming and snow removal. It is pushed or pulled across the ground. Human power or other animal power was usual in past centuries; in the 20th century plows are mostly pulled by tractors. The plow lifts and turns dirt and makes two lines of dirt behind it. Turning the soil buries weeds, brings more nutrients to the top, and loosens the soil. Crops grow better in land that has been plowed.