80
 PERCENTAGE OF
 ONE ROOM COUNTY SCHOOLS



 60

 50


 40











 POOR SOIL AREAS RICH SOILAREAS

 PLATE V
 Showing the percentage of one room schools, and in-
 experienced teachers on poor soil compared to rich
 soil.
 (Courtesy, Tennessee Valley Authority.)

is most common in sandy lands of humid regions. The greater
part of Florida would come under this type of soil losses- The
losses are so great that a high tonnage of fertilizers are used
annually in Florida soils.

 CONTROL MEASURES

 For many years certain American farmers have devised some
erosion control measures in their own individual ways. Some
of these measures have been partially successful. The construc-
tion of elevated ridges or terraces in the field to control erosion
has been practiced for many decades. On the whole the farm
people have not been financially able to construct proper ter-