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. 



Dominant 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 

 1.295 

 1,110 

 980 

 882 

 808 

 752 

 707 

 668 

 640 

 620 

 603 

 590 

 579 

 568 

 558 

 549 



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 

 37.3 

 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 



5.6 



30 



6.6 



35 



7.4 



40 



8.1 



45 



8.7 



50 



9.1 



55 



9.5 



60 



9.9 



65 



10.2 



70 



10.4 



75 



10.7 



80 



10.8 



85 



90 



11.0 

 11.2 



95 



11.3 



100 



11.5 







QUALITY II. 



1,996 

 1, 520 

 1,285 

 1,142 



98 

 120 

 142 

 162 



3.0 

 3.8 

 4.5 

 5.1 









1,603 



1,316 



1,062 



890 



84 

 115 

 139 



157 



3.1 

 4.0 

 4.9 

 5.7 



566 

 530 

 504 

 484 



40 



60 



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 



3.6 

 4.6 

 5.4 

 6.2 

 6.8 

 7.4 

 7.8 

 8.2 

 8.5 

 8.8 

 9.1 

 9.3 

 9.5 

 9.7 

 9.8 

 10.0 

 10.2 



QUALITY III. 



2,803 

 1,870 

 1,540 

 1,357 

 1,224 



81 

 98 

 115 

 131 



147 



2.3 

 3.1 



3.7 

 4.2 

 4.7 









2,134 



1,620 



1,304 



1,074 



924 



67 

 90 

 109 

 124 

 136 



2.4 

 3.2 

 3.9 

 4.6 

 5.2 



678 

 623 

 580 

 548 

 526 



27 

 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 



2.7 

 3.5 

 4.3 

 5.0 



5.6 

 6.1 

 6.5 

 6.9 

 7.2 

 7.5 

 7.7 

 7.9 

 8.1 

 8.3 

 8.5 

 8.6 

 8.8 



Based on 59 sample plots, measured in 1910. Total area, 13.1 acres. 



