1126 
Journal of Agricultural Research 
Vol. XXXI, No. 12 
Table II.— Yield of pure yellow pine, Lossen National Forest, Calif —Continued 
SITE 2 c 
Total 
age 
(years) 
Number 
of trees 
per 
acre 
Basal 
area 
per 
acre 
Height 
of domi¬ 
nant 
Average 
diameter 
at breast 
height 
Volume per acre 
Periodic 
annual 
growth 
Mean 
annual 
growth 
Board- 
feet per 
cubic 
foot « 
60.. 
417 
Sq.ft. 
142 
Feet 
41.0 
Inches 
8.0 
M. bd.-ft. 
1.0 
Cu.ft. 
1,060 
M. bd.-ft. 
o.io 
M. bd.-ft. 
0.02 
0.94 
70_ 
280 
165 
51.0 
10.4" 
8.0 
2,660 
.70 
.11 
3.01 
80__.. 
222 
189 
61.0 
12.5 
17.0 
4,260 
.90 
.21 
3.99 
90_ 
196 
215 
71.0 
14.2 
27.0 
6,030 
1.00 
.30 
4.48 
100___. 
177 
235 
81.0 
15.6 
38.0 
7,800 
1.10 
.38 
4.87 
110_ 
164 
255 
91.D 
16.9 
48.0 
9,110 
1.00 
.44 
5.27 
120__. 
156 
270 
97.0 
17.8 
56.0 
10,190 
.80 
.47 
5.50 
130__.. 
148 
283 
100.0 
18.7 
61.0 
11,050 
.50 
.47 
5.52 
140_ 
148 
295 
103.5 
19.1 
65.0 
11,730 
.40 
.46 
5.54 
150_ 
147 
305 
107.0 
19.5 
68.5 
12,300 
.35 
.46 
5.57 
SITE 3 d 
4 
60.. 
450 
124 
34.0 
7.1 
70_ 
331 
143 
42.0 
8.9 
3.0 
1,180 
0.3 
0.04 
2.54 
80___. 
273 
164 
52.0 
10.5 
9.0 
2,600 
.6 
.11 
3.46 
90_ 
229 
183 
62.0 
12.1 
17.3 
3,900 
.83 
.19 
4.44 
100___. 
209 
202 
71.0 
13.3 
25.7 
5,400 
.84 
.26 
4.76 
110.. 
191 
219 
81.0 
14.5 
34.0 
7,000 
.83 
.31 
4.86 
120.. 
178 
230 
85.0 
15.4 
40.7 
7,970 
.67 
.34 
5.11 
130 
167 
237 
88.0 
16.1 
45.0 
8,600 
9,100 
.43 
.35 
5.23 
140._ 
162 
243 
91.0 
16.6 
47.7 
.27 
.34 
5.24 
150... 
158 
249 
93.0 
17.0 
50.5 
9,570 
.28 
.34 
5.28 
SITE 4 • 
60. .. 
526 
100 
28.0 
5.9 
70_ 
395 
118 
36.0 
7.4 
0.5 
450 
0.007 
1.11 
80... 
335 
135 
43.0 
8.6 
4.0 
1,600 
0.35 
.05 
2.50 
90_ 
296 
152 
52.0 
9.7 
8.4 
2,650 
.44 
.09 
3.17 
100.- 
270 
169 
60.0 
10.7 
13.7 
3,750 
.53 
.14 
3.65 
110_ 
247 
182 
68.0 
11.6 
20.2 
4,800 
.65 
.18 
4.21 
120.. 
221 
191 
73.0 
12.6 
26.0 
5,570 
.58 
.22 
4.67 
130_ 
205 
200 
76.5 
13.4 
30.0 
6,070 
.40 
.23 
4.94 
140.. 
189 
205 
79.0 
14.1 
33.0 
6,500 
.30 
.24 
5.08 
150. 
177 
209 
81.0 
14.7 
35.8 
6,830 
.28 
.24 
5.24 
SITE 5 / 
60.. 
i 
727 
81 
21.0 
4.5 
70__ 
531 
94 
28.0 
5.7 
80.. 
429 
108 
35.0 
6.8 
1.0 
850 
0.1 
0.012 
1.18 
90. 
375 
121 
42.5 
7.7 
3.5 
1,700 
.25 
.04 
2.06 
100_ 
337 
133 
50.0 
8.5 
6.5 
2,400 
.30 
.06 
2.71 
110_ 
296 
143 
56.5 
9.4 
10.2 
3,050 
.37 
.09 
3.34 
120_. 
273 
152 
61.0 
10.1 
14.5 
3,550 
.43 
.12 
4.08 
130_ 
252 
160 
63.0 
10.8 
18.3 
3,920 
.38 
.14 
4.67 
140.. 
238 
166 
64.5 
11.3 
21.5 
4,280 
.32 
.15 
5.02 
150.. 
229 
171 
66.0 
11.7 
24.2 
4,600 
.27 
.16 
5.26 
« Mature heights, 131 to 150 feet; yellow pine 80+ per cent; basis, 27 plots. 
d Mature heights, 111 to 130 feet; yellow pine 80+ per cent; basis, 66 plots. 
• Mature heights, 91 to 110 feet; yellow pine 80+ per cent; basis, 21 plots. 
f Mature heights, 71 to 90 feet; yellow pine 80+ per cent; basis, 10 plots. 
The site 3 quality class was the one in which most of the work was 
done, 66 out of a total of 132 plots falling in that class. (See Table 
I.) Site qualities 2 and 4 also had a very fair, representation of 
plots, but the values in basal area per acre and volume per acre for 
sites 1 and 5 were very poorly defined, and the curves are drawn in 
part by inference. 
