Archaeologists have found acres of ridged fields where Oneota farmers grew corn, beans and squash. Ridged fields were created by piling the soil into long parallel ridges. These early farmers grew corn on the ridge, with beans growing up the corn stalk and the squash covering the ground around the base of the corn. The corn provided support for the beans to grow on and the squash provided ground cover that helped keep weeds down. Hoes made from the shoulder blades (scapula) of animals, such as bison and elk, were used to tend the fields. People went though the trouble to make the ridged fields because it helped to ensure a successful harvest. The ridge raised the corn just enough to protect it from flood and frost and it effectively extended the growing season a bit longer.