196 
THE WOODSMAN’S HANDBOOK. 
TABLE 65.—Pine, Loblolly—Yield Per Acre.2 
MARYLAND. 
[Data gathered by W. D. Sterrett for Loblolly Pine Study, 1907.] 
Age. 
Years. 
NotTe.—This table is based on sample plots of limited area. 
could hardly be counted on for such a uniformly dense stand unless openings were 
On the other 
Trees per acre. 
1,040 
750 
590 
400 
310 
250 
1, 840 
1, 420 
1,000 
700 
500 
370 
Aver- 
age 
diam- 
eter of 
domi- 
nant 
trees. 
Inches. 
3.6 
4.9 
6.1 
(i 
8.1 
8.9 
QUALITY I. 
Aver- Yield. 
age 
height 
of 
domi- 
nant Box 
trees Total. boards.0 
Feet, >| Cu.ft<\|) Ba ft. 
a2 | 2.00) |-23-400 
43 | 3,000, 9,000 
52 | 3,650 | 15, 400 
59 | 4,200 | 18,900 
65 | 4,500 | 21,800 
70 | 4,750 | 24,100 
QUALITY II. 
28 1,550 | 1,400 
35 1° 12,4005) 3-600 
4] 2,400). -¥, 400 
47 | 3,100 | 11,300 
52 | 3,300 | 14,000 
57 || 3,000 a5. 800 
| 
Percentage of total 
yield in diameter 
classes. 
1to5|6to9 
inches. inches. 
Pr. ct) Pict: 
65 34 
32 53 
13 59 
4 56 
1 7 
: ae 34 
| 
78 22 
60 40 
39 51 
23 57 
11 58 
9) 50 
carefully planted up and the forest kept under scientific control. 
hand, the natural stands contained about 10 per cent of other species, which are 
left out of the total as a factor of safety. 
The yields were approximated by means of white-pine volume tables, and 10 per. 
cent was deducted from the yield in box boards against a possible variation between 
the volumes of bark in the two species and as a further factor of safety. 
This table is based on 48 quality I and 23 quality II, sample plots. 
a Approximate yield in pure, unmanaged, fully stocked stands on old fields. 
b Round or ‘‘waney’”’ edged boards—saw cut. Square-edged material would 
show a smaller yield. 
| inches 
| and 
| over. 
Py Ck: 
1, 
15 
28 
40 
52 
66 
Extended areas 
