U. S. SOIL CONSERVATION SERVICE 



Figure 26. Very serious octupuslike spread of gullying. 

 Compare figure 40. 



U. S. SOIL CONSERVATION SERVICE 



Figure 27. Eroded beyond restoration. 



U. S. SOIL CONSERVATION SERVICE 



Figure 28. The dust storm of May 11, 1934, swept 300 

 million tons of rich top soil off the great wheat plains. 



