FIG-. 24. California pastnreland destroyed by 

 overgrazing and bad management of herds. 

 Cattle trails started these gullies. Man, as a 

 steward of natural resources, is morallly obli- 

 gated to study the reaction of his land, the 

 nature and habits of his animals, and to devise 

 a system of management for safe, sustained 

 uses. 



67 



