THE BED SPRUCE. 



43 



Table 17. — Yield of red spruce in old-field stands. 



[Based on the yield of dominant, codominant, and intermediate trees only.) 



QUALITY I. 



Age. 



Trees 

 per acre. 



Basal 

 area. 



Average 



diameter 



breast 



high. 



Height. 



Yield per acre. 1 



Forest 

 form 

 factor. 



Basis. 2 



Years. 

 20 

 25 

 30 

 35 

 40 

 45 

 50 

 55 

 CO 

 65 

 70 

 75 

 80 

 85 

 90 

 95 

 100 



Number. 

 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 



Feet. 

 24 

 31 

 36 

 42 

 46 

 51 

 55 

 58 

 61 

 64 

 66 

 68 

 70 

 72 

 73 

 74 

 76 



Bd.Jt.s 



Cu.ftS 



Cords. r > 





Plots. 











1 





















15, 200 

 19, 700 

 23, 300 

 26,200 

 28, 500 

 39, 500 

 32, 100 

 33, 500 

 34, 800 

 35,900 

 37, 000 

 38, 100 

 39,100 



3,660 

 4,500 

 5,140 

 5,000 

 5,950 

 6,240 

 6,490 

 6,700 

 6,890 

 7,050 

 7,180 

 7,300 

 7,390 



31 

 40 



48 

 55 

 60 

 64 



68 

 70 



72 

 74 

 76 

 77 

 78 



.38 

 .42 

 .42 

 .42 

 .41 

 .40 

 .40 

 .39 

 .39 

 .39 

 .38 

 .38 

 .37 





1 



2 

 1 

 4 

 5 

 1 















15 



QUALITY II. 



20 

 25 

 30 

 35 



40 

 45 

 50 

 55 

 60 

 65 

 70 

 75 

 80 

 85 

 90 

 95 

 100 



1,603 

 1,316 

 1,062 

 890 

 774 

 697 

 643 

 605 

 575 

 551 

 532 

 516 

 503 

 492 

 482 

 472 

 463 



84 

 115 

 139 

 157 

 171 

 181 

 189 

 196 

 201 

 206 

 210 

 213 

 216 

 220 

 223 

 226 

 228 



3.1 



4.0 

 4.9 



5.7 

 6.3 

 6.9 

 7.4 

 7.7 

 8.0 

 8.2 

 8.5 

 8.7 

 8.9 

 9.0 

 9.2 

 9.4 

 9.5 



19 

 25 

 31 



36 

 40 

 44 

 47 

 50 

 53 

 55 

 57 

 59 

 61 

 C3 

 64 

 65 

 66 









































1 



10, 700 

 14, 100 

 17, 100 

 19, 600 

 21, 700 

 23,500 

 25,000 

 26,200 

 27,300 

 28,300 

 29,300 

 30, 200 

 31, 100 



3,000 

 3,770 

 4,320 

 4,720 

 5,050 

 5,310 

 5,550 

 5.750 

 5,910 

 6,050 

 6,170 

 6,280 

 6,370 



23 

 31 



38 

 44 

 48 

 52 

 54 

 57 

 59 

 61 

 62 

 63 

 64 



.44 

 .47 

 .48 

 .48 

 .47 

 .47 

 .46 

 .46 

 .45 

 .44 

 .43 

 .43 

 .42 





.2 

 5 



9 

 8 

 3 













28 



QUALITY III. 



20 

 25 

 30 

 35 

 40 

 45 

 50 

 55 

 60 

 65 

 70 

 75 

 80 

 85 

 90 

 95 

 100 



2,134 

 1, 620 

 1,304 

 1,074 

 924 

 827 

 755 

 703 

 664 

 634 

 609 

 588 

 569 

 551 

 533 

 516 

 499 



67 

 90 

 109 

 124 

 136 

 145 

 153 

 159 

 164 

 168 

 172 

 176 

 180 

 183 

 186 

 189 

 192 



2.4 

 3.2 

 3.9 

 4.6 

 5.2 

 5.7 

 6.1 

 6.4 

 6.7 

 7.0 

 7.2 

 7.4 

 7.6 

 7.8 

 8.0 

 8.2 

 8.4 



14 

 20 



25 

 30 

 34 

 37 

 40 

 42 

 45 

 47 

 49 

 50 

 52 

 53 

 55 

 56 

 57 





















1 









: 







6,200 

 8,600 

 10, 900 

 13, 000 

 14, 900 

 10, 500 

 17, 800 

 18,900 

 19, 800 

 20, GOO 

 21,300 

 21, 900 

 22,500 



2,330 

 3,000 

 3,500 

 3,800 

 4,150 

 4,390 

 4,590 

 4,760 

 4,920 

 5,050 

 5,170 

 5, 260 

 5,340 



15 

 22 

 28 

 32 

 36 

 39 

 41 

 43 

 45 

 47 

 48 

 49 

 50 



.51 

 .56 

 .57 

 .57 

 .57 

 .56 

 .55 

 .54 

 .53 

 .52 

 .51 

 .50 

 .49 







2 



4 

 2 

 5 

 1 

 1 





1 





10 



i Yield from suppressed and dead trees ignored. See Table 53 for actual figures on which this yield 

 table is based. 



2 Based on 59 plots, in even-aged old pasture stands; area 13.1 acres, taken in Oxford and Penobscot 

 Counties, Me.; Coos, Grafton, and Sullivan Counties, N. H.; Caledonia and Windsor Counties, Vt. 



3 Trees 7 inches and over in diameter breast high; scaled by the New Hampshire Rule; top diameter 

 inside bark, 6 inches, stump height, 1 foot. 



4 Trees 4 inches and over in diameter breast high; top diameter outside bark, 4 inches, stump height, 1 

 foot. 



6 Trees 6 inches and over in diameter breast high; top diameter outside bark, 5 inches, stump height, 1 

 foot. 



