GENERAL INSTRUCTION IN GRAZING 389 



{D) Supplemental feed. 

 {a) Concentrates. 



I. Kinds, amount, 

 how and when fed. 

 (&) Roughages. 



I. Silage, hay, other. 



(2) Cattle. (Same as under (i) above.) 



(3) Goats. 



(4) Horses. 



D. Animals of prey. 



a. Food habits, 

 (i) Plants. 

 (2) Animals. 



{A) Domestic. 

 {B) Rodents and other. 

 h. Life history of different species pertinent 

 to control work. 



(i) Mating season. 



(2) Period of gestation. 



(3) Season when offspring is born. 



(4) Period required for full development. 



c. Protection against livestock losses. 



(i) Most effective protection of pasture 

 stock. 



(2) Effective control of predatory ani- 

 mals. 



{A) Trapping, hunting, poisoning. 



d. Improved methods of control based upon 

 Hfe-history studies. 



E. Range-destroying rodents. 



a. Food habits. 



h. Life-history studies of important species. 



(i) (Same as under " 6 " above). 

 c. Control. 



(i) Effective poisons in different seasons. 



(2) Other methods of control. 



General Instruction in Grazing. — In view of the broad 



training essential for the professionally trained grazing expert, 



it would not be possible for students of general agriculture and 



