Modern farm machinery has reached its greatest development in our Middle Western and Western states. This is no small part due to the nature of the land. In the older lands of the East, there were rocks and trees and rough ground. These were all serious problems for the farmer. Trees had to be cleared from the ground first of all. Then stumps and stones wre gradually removed. Then on the hillsides the ground washed in deep gullies. Stones, stumps, gullies, and small fields are all against the use of machinery. On the other hand the rich prairie had none of these drawbacks. Farms are often miles in extent. The ground is level or only gently rolling. Stumps are unknown, excepting rarely; and stones are infrequently found. Here is the land of farming on a big scale. In recent years tractors have furnished the

power to break up the ground. This is the heavy work in tilling. The view shows one tractor doing the work of nine horses. Three plows are turning over the black earth--a great width of it. The tractor takes its load lightly. One man runs the machine. Three men were formerly needed to handle the same number plows. Why? What other implements on the farm are now run by machinery? Compare this method of plowing with that used in other countries. South Dakota lies in our great wheat belt. Most of its wheat is sown in the spring. The farm you see here will be a busy place in harvest time during the midsummer. Throughout the Middle West and West, even on small farms, tractors are coming to be used more and more. They furnish power especially to plow and the harrow the soil.