THE RED SPRUCE. 
37 
Table 14. — Breast-high sectional area growth of red spruce in even-aged, old pasture stands 
in Maine, New Hampshire, and Vermont, according to age and site qualities. 
QUALITY I. 
[CURVED.] 
All green trees. 
Green trees 6 inches 
and over. 
Dominant and inter- 
mediate trees. 
D ominant trees only. 
Age. 
Trees 
per 
acre. 
Basal 
area. 
Aver- 
age 
diam- 
eter 
breast 
high. 
Trees 
per 
acre. 
Basal 
area. 
Aver- 
age 
diam- 
eter 
breast 
high. 
Trees 
per 
acre. 
Basal 
area. 
Aver- 
age 
diam- 
eter 
breast 
high. 
Trees 
per 
acre. 
Basal 
area. 
Aver- 
age 
diam- 
eter 
breast 
high. 
Years. 
20 
No. 
1,580 
L295 
1,110 
980 
882 
808 
752 
707 
Sq.ft. 
115 
142 
168 
193 
216 
237 
256 
272 
286 
298 
308 
317 
325 
332 
338 
344 
349 
Inches. 
3.6 
4.5 
5.3 
6.0 
6.7 
7.3 
7.9 
8.4 
8.8 
9.2 
9.5 
9.8 
10.1 
10.3 
10.5 
10.7 
10.8 
No. 
Sq.ft. 
Inches . 
No. 
1,294 
1,076 
887 
756 
668 
603 
558 
527 
506 
490 
478 
467 
457 
447 
437 
427 
417 
Sq.ft. 
102 
140 
169 
190 
205 
216 
225 
232 
. 238 
242 
247 
250 
253 
256 
259 
262 
264 
Inches. 
3.8 
4.9 
5.9 
6.8 
7.5 
8.1 
8.6 
9.0 
9.3 
9.5 
9.7 
9.9 
10.1 
10.2 
10.4 
10.6 
10.8 
No. 
489 
466 
447 
432 
420 
410 
402 
395 
388 
383 
378 
373 
368 
363 
359 
355 
351 
Sq.ft. 
54 
80 
106 
129 
150 
167 
183 
195 
206 
215 
223 
230 
236 
240 
245 
249 
252 
Inches . 
4.5 
25 
102 
187 
267 
345 
419 
462 
480 
487 
490 
491 
490 
489 
487 
485 
483 
481 
20 
47 
77 
114 
157 
195 
222 
241 
256 
268 
278 
287 
294 
301 
308 
313 
6.0 
6.7 
7.3 
7.8 
8.3 
8.8 
9.2 
9.5 
9.8 
10.0 
10.2 
10.4 
10.5 
10.7 
10.8 
10.9 
5.0 
30... 
6. 6 
35 
7.4 
40 
8.1 
45 
8.7 
50 
9.1 
55 
9.5 
60 
668 
640 
620 
603 
590 
579 
9.9 
65 
10.2 
70 
75 
80 
10.4 
10.7 
10.8 
85 
11.0 
90 
568 
558 
549 
11. 2 
95 
11.3 
100 
11.5 
I 
QUALITY II. 
1,996 
1, 520 
120 
3.0 
3.8 
1,603 
1,316 
84 
115 
3.1 
4.0 
566 
530 
40 
60 
1,285 
1,142 
142 
162 
4.5 
5.1 
1,062 
890 
139 
157 
4.9 
5.7 
504 
484 
81 
101 
260 
58 
6.4 
1,032 
182 
5. 7 
335 
88 
7.0 
774 
171 
6.3 
470 
119 
949 
199 
6.2 
403 
122 
7.4 
697 
181 
6.9 
459 
136 
880 
215 
6.7 
467 
155 
7.8 
643 
189 
7.4 
451 
151 
830 
229 
7.1 
497 
180 
8.1 
605 
196 
7.7 
443 
162 
789 
242 
7.5 
516 
199 
8." 4 
575 
201 
8.0 
435 
172 
756 
253 
7.8 
530 
214 
8.6 
551 
206 
8.2 
427 
181 
732 
262 
8.1 
540 
226 
8.8 
532 
210 
8.5 
420 
188 
708 
270 
8.4 
544 
235 
8.9 
516 
213 
8.7 
413 
194 
689 
278 
8.6 
544 
244 
9.1 
503 
216 
8.9 
407 
200 
672 
284 
8.8 
542 
251 
9.2 
492 
220 
9.0 
401 
205 
656 
290 
9.0 
540 
257 
9.3 
482 
223 
9.2 
395 
209 
642 
295 
9.2 
537 
263 
9.5 
472 
226 
9.4 
390 
213 
632 
300 
9.3 
533 
268 
9.6 
463 
228 
9.5 
385 
217 
QUALITY III. 
80. 
85. 
90. 
95. 
100 
2,803 
81 
2.3 
2,134 
67 
2.4 
678 
27 
1,870 
1,540 
1,357 
1,224 
98 
115 
131 
147 
3.1 
3.7 
4.2 
4.7 
1,620 
1,304 
1,074 
924 
90 
109 
124 
136 
3.2 
3.9 
4.6 
5.2 
623 
580 
548 
526 
42 
57 
73 
90 


311 
61 
6.0 
1,129 
161 
5.1 
386 
89 
6.5 
827 
145 
5.7 
514 
105 
1.055 
175 
5.5 
455 
115 
6.8 
755 
153 
6.1 
505 
119 
996 
187 
5.9 
515 
138 
7.0 
703 
159 
6.4 
496 
129 
945 
198 
6.2 
549 
156 
7.2 
664 
164 
6.7 
488 
138 
903 
208 
6.5 
572 
171 
. 7.4 
634 
168 
7.0 
480 
146 
866 
216 
6.7 
587 
183 
7.6 
609 
172 
7.2 
472 
153 
838 
224 
7.0 
597 
193 
7.7 
588 
176 
7.4 
464 
158 
813 
230 
7.2 
606 
201 
7.8 
569 
180 
7.6 
457 
164 
790 
236 
7.4 
602 
207 
8.0 
551 
183 
7.8 
450 
168 
772 
242 
7.6 
596 
212 
8.1 
533 
186 
8.0 
443 
173 
760 
246 
7. 7 
588 
217 
8.2 
516 
189 
8.2 
436 
177 
750 
251 
7.8 
580 
222 
8.3 
499 
192 
8.4 
430 
181 
Based on 59 sample plots, measured in 1910. Total area, 13.1 acres. 
