Figure 10. — Estimated 

 versus actual ero- 

 sion on the Basalt 

 study area. 



S 0.05 



0.02 - 



0.01 



0.01 0.02 0.05 0.1 0.2 0.5 1 2 5 10 



ACTUAL SOIL EROSION (Pounds per milacre) 



Figure 11. — Soil erosion 

 on the Basalt study 

 area in the relation 

 to peraent of soil 

 surface protected 

 from direct raindrop 

 impact when the sur- 

 face inch of soil 

 contains 38 percent 

 sand and 9 peraent 

 organic matter. 



50 60 70 80 



PLANT, LITTER. AND STONE COVER (%) 



13 



