



U.S. FOREST SERVICE 



Figure 20.- The slashings of a logged area invite fire. 



U. S. FOREST SERVICE 



Figure 21. After a fire has destroyed protecting litter, humus, and 

 roots, the top soil is easily washed into the streams. 



U. S. BUREAU OF AGRICULTURAL ENGINEERING 



Figure 22. Turning under natural sod cover. Excessive "de-grass- 

 ation" is a companion evil to excessive deforestation. 



