LIFE AND THE NATURAL LAWS 



85 



39. Three soil samples with coins placed on surface. The setup is similar 

 to a well prepared seedbed. 



FIG-. 40. After 75 minutes of artificial rain, the splash erosion is clearly evi- 

 dent. The white board behind the pots is six inches away. On sloping 1 land, 

 the splashed soil would fall into the surface flow of water and be carried down- 

 hill. _ The coins illustrate the protective nature of mulch. 



FIG. 41. Soil samples covered by a field mulch and subjected to rainfall show 

 very little soil movement from drop impact. Applied or not applied on a nation- 

 wide scale, this simple fact may determine whether or not a country can retain 

 a satisfactory standard of living-. 



