(plow) is a tool used by farmers to cultivate soil before planting or sowing seed. The sharp blade(s) of the plough push through the soil, bringing ‘good’ soil and nutrients to the surface and burying weeds. In the past ploughs were usually pulled by animals, with horses and oxen being the most common animals used. A person would walk behind the plough, holding the handles in order to drive it and keep it upright. Now mechanical means such as tractor-pulled ploughs tend to be used.