AN APPRAISAL OF POWER USED ON FARMS 
21 
Fig. 21.— This map, showing the distribution of farms, might also serve as a map of farm population. 
The densest areas are southeastern Pennsylvania, the upper Piedmont of South Carolina and Geor- 
gia, eastern, central, and western Tennessee, the Ohio Valley, and the Yazoo Delta in Mississippi. 
Over half the farms in the United States are in the Cotton Belt and the Corn and Winter Wheat 
Region. Many of the tenant farms on the plantations in the Cotton Belt, however, are little more 
than laborers' allotments. The Corn Belt, although it includes over one-third the value of farm prop- 
erty in the United States, has only one-seventh of the farms. Nine-tenths of the farms are in the 
eastern half of the United States. The relative density of farm population in the South is even greater 
than that of farms. (U. S. Dept. Agr. Yearbook 1921.) 
