20 
BULLETIN 741, U. S. DEPARTMENT OF AGRICULTURE. 
Table 8 shows that while the plot was grazed much more closely 
than would be warranted on the basis of sustained forage yield, only 
8 of the 69 sprouts on the transect (11.6 *per cent) were seriously 
grazed and thus likely subsequently either to die or become very 
deformed. All the other sprouts were in vigorous condition; and 
though they were browsed slightly, the damage was not such as to 
manifest itself in the future development of the stand. In most in- 
stances the browsing was confined to the lateral branches, only 20 
of the 69 sprouts (29 per cent) having both the terminals and the 
laterals removed. Only 3,483 of the 30,056 sprouts to the acre were 
seriously weakened 
by browsing, leaving 
26,571 vigorous speci- 
mens for the estab- 
lishment of the stand, 
a number exceeding 
by more than 24,000 
the quantity neces- 
sary to restock the 
land fully. 
The most signifi- 
cant fact brought out 
by the experiment is 
that the maximum 
height of sheep brows- 
ing was 47 inches, 
and this occurred only 
Average Height Of Sprouts ^ the case of a single 
Heiyhj- Of Sprouts Exempt From specimen. To show 
[Serious browsing more clearly than in 
a u ■ l± o ~, Table 8 the average 
Average He,ght Bisect ^^ ^ wWch ^ 
Fig. e.-Heights at which sprouts are browsed. browsing OCCUTred, the 
sprouts were grouped into 6-inch height classes and the average height 
of the browsing in the case of each height class recorded. The figures 
are given in Table 9 and the results are shown graphically in figure 6. 
Table 9. — Summary of heights at which aspen sprouts are browsed by sheep. 
70 
8'** 
^ 
. 
^ so 
$ 
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o 
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r 
A 
s* 
.Is'* 
* O 
4 S 6 7 
C/ass Of Sprouts 
Height 
class No. 
Number of 
specimens 
in each 
Height class. 
Average 
height 
grazed. 
height class. 
Average. 
Mean. 
Inches. 
Inches. 
Inches. 
1 
1 
18 to 23 
21 
21.0 
2 
2 
24 to 29 
27 
29.0 
3 
6 
30to35 
33 
30.7 
4 
13 
36 to 41 
39 
36.8 
5 
10 
42 to 47 
45 
41.1 
6 
10 
48 to 53 
51 
39.0 
7 
12 
54 to 59 
57 
40.1 
8 
5 
60to65 
63 
38.2 
9 
10 
66 to 71 
69 
41.8 
