EFFECT OF GRAZING ON WESTERN YELLOW PINE. 1 
DAMAGE BY PERIODS. 
To determine the damage caused during different periods of the 
grazing season, four examinations were made of all plots during the 
seasons of 1912 and 1913. The first examination was made at the 
beginning of the grazing season; the second early in July at the 
ass 
8 
Percent of Trees in each Cl; 
3 
Damage - 
Bae of Sek toni ge hey ee 
Fig. 2.—Extent of damage to reproduction of different heights. 
close of the early summer drought; the third in the fore part of Sep- 
tember, following the period of maximum plant growth; and the 
fourth early in November at the end of the grazing season. Results 
for the two years are summarized for the respective periods in 
Table III. 
