WESTERN YELLOW PINE IN OREGON. 
21 
Table 7.— Number of trees per acre by diameter classes of yellow pine and of other species 
in several representative stands in central and eastern Oregon — Continued. 
Diameter at breastheight. 
Near Embody, 
Lake County. 
Basis: 30 acres. 
Near 
Lapine, 
Crook 
County. 
Basis: 
40 acres. 
Klamath Lake 
Region, 
Klamath County. 
Basis: 159 acres. 
Yellow- 
pine. 
Others. 
Yellow 
pine. 
Yellow 
pine. 
Others. 
Inches. 
2 
14.11 
9.41 
4.71 
4.73 
4.33 
3.27 
3.83 
3.67 
3.30 
2.83 
2.80 
2.23 
2.20 
1.70 
1.47 
1.33 
1.30 
.80 
.37 
.20 
.30 
.40 
0.08 
.07 
.05 
.13 
.17 
.06 
.06 
0.75 
.50 
.25 
.32 
.22 
.25 
.35 
.25 
.42 
.65 
1.00 
1.10 
1.15 
1.22 
1.40 
1.32 
.67 
.80 
.60 
.42 
6.71 
5.23 
2.72 
2.09 
1.94 
1.79 
1.84 
1.99 
2.09 
2.35 
1.96 
2.27 
1.99 
2.46 
1.74 
1.35 
1.10 
.72 
.59 
.38 
.30 
.45 
8.52 
5.29 
5.28 
2.46 
1.29 
1.35 
1.06 
1.21 
.67 
1.14 
.45 
.72 
.62 
48 
4 
6 
8 
10 
12 
14 
16 
18 
.06 
20 
22 
24 
.03 
26 
28 
30 
.45 
32 
34 
36 
36 
24 
38 
.16 
15 
40 
42 
08 
Over 43 
.27 
26 
Total 
69.29 
32.00 
.71 
.21 
13.91 
11.87 
44.06 
25.37 
32 68 
Total over 12 inches 
9 84 
VOLUME PER ACRE. 
Yellow-pine forests are so irregular in density that figures for the 
average stand per acre or per quarter section are apt to be mis- 
leading. Though the volume of timber may be very high on an area 
of an acre or so, there are usually openings in the forest, groups of 
young growth, glades, or barren spots, which reduce the average per 
acre volume of any large tract. Single sample acres frequently have 
a stand of 50,000 feet b. m. both in the Blue Mountain region and 
on the Cascades, but it is considered to be a good quarter section 
that has 4,000,000 feet b. m. or 25,000 feet to the acre. The following 
estimates of the amount of merchantable timber on two small water- 
sheds, in different parts of the State, are representative of the regions 
which they typify, and illustrate the average density and composition 
of species on large tracts such as are now being logged. Estimate A 
is for a watershed at the head of one branch of the John Day River 
in the Blue Mountains, and Estimate B is for a watershed on the 
eastern slopes of the Cascades in Klamath County. 
Estimate A. 
Total area of watershed acres. . 11, 777 
Area covered by merchantable timber 1 do 6, 297 
Average stand per acre, of all species, on area of merchantable timber. Jeetb.m. . 13, 672 
Total stand composed of — ■ 
Western yellow pine per cent. . 84 
Western larch do 9 
Douglas fir, white fir, and lodgepole pine do 7 
1 The balance of the watershed is meadow, barren "scabby" ridges, patches of young timber, and 
noncommercial stands of lodgepole pine. 
