372 PASTURE MANAGEMENT AND LIVESTOCK PRODUCTION 



D. How to determine grazing capacity. 



a. Indirect method. 



b. Direct method. 



(i) Estimate of " animal-days " feed. 

 {A) Grazing reconnaissance. 

 {B) Actual grazing-capacity tests. 

 4. Revegetation. 

 A. The range. 



a. Cost of overgrazing. 



b. Artificial revegetation (cultivated forage 

 plants). 



(i) Growth conditions over western na- 

 tive range lands as affecting artificial 

 reseeding. 



(2) Results of plant introduction on arid 

 lands. 



{A) Cultivated grasses. 

 {B) Other plants. 



(3) Plant introduction on mountain lands 

 in different grazing regions. 



{A) Success with various species. 

 {B) Cultural implements; season 

 of seeding; elevational limita- 

 tions; causes of failure, etc. 

 (C) Artificial reseeding to native 

 forage plants, 

 (a) Collecting seed and 

 cost; methods of sow- 

 ing; results. 



c. Natural revegetation. 



(i) Requirements of forage growth. 

 {A) Life-history studies. 

 {B) EstabHshment of seedling 

 plants. 



