Tasie 3.—Present area of forest land in the Upper Peninsula by 
forest-cover type and size class } 
Forest-cover type and size class Area 
1,000 acres | Percent 
PAE Sy pit ae eee Soe ee, Se ee ee TS 
tise pina oe ee ee ee 50 ee 
DP nr ee Se ee ee VAS |b SS 
[ei eu ee ee a ee (rr 4.3 
Spruce-fir___----- 1, 135 12.2 
Spruce swamp 429 | Se 
eRINArACK SWAMP ee > 2 ean 173 | wbase 
Ce STM UT) tees ee ee Se eS AAG S| ye ee Ce 
Conifer swamp__- Pea ene Sot } 11.2 
Northern hardwoods 222 De 
Ash-elm (lowland hardwoods)-__--_--------------- 0.11) Woke Soe 
IHinr dh wO0ods eee ee == = = e 23 ee 36.7 
Ye eee to ee 2, 082 = 
oi rg tT ee Shaw SE o. $5 se CA. ase 
Nonproductive swamp 20 | —= 
PURITINSRRMIMICRR UC er = eo ee eee seess 2 22.7 
Deloren henner a a Ts 2=| 1, 204 12.9 
ANT Ge a oe a ae eens eee 9, 336 100.0 
Oid-erawsmsawn cimiber=s 2) ee Ae 1, 658 1748 
Second-growth saw timber 754 8.1 
Sorel OQU Saar eae ee en Sessa 1, 727 18.5 
air Loc OOm Tes OCHING = —— =  2-o 2, 134 22.8 
WovrrestwoCkinee = fae ha 8 SF ee ee 1, 859 19.9 
Sle feres ted ee ae ee a ee ee 1, 204 12.9 
ANG 27 = es 9, 336 100.0 
1 See table 17, Appendix, for more details of size-class distribution. 
Taste 4.—Volume per average acre cut and left in a selective- 
logging operation in a typical old-growth northern hardwood 
Forest, by diameter classes 
Original stand 
Diameter class Volume left 
inches Saw- 
ea Trees Bes timber 
volume 
Num-| Square| Board | Per- | Board | Per- | Board 
ber feet feet cent feet cent feet 
282 Se 259.3 PD E7 /ul| ee erat eee rl eae ee 
LO 17.0 9.3 300 0 0 100 300 
[be eee 14.5 11.4 750 7 50 93 700 
pf eee eas 11.9 12.7 1, 100 15 165 85 935 
165 10.3 14.4 1, 470 26 380 74 1, 090 
16 } 7.9 13.9 1, 500 43 645 57 855 
yee oe Ieee | 38 12.6 1, 530 74 1, 130 26 400 
77 bets eae 3.9 10.3 | 1,300 83 | 1,080 17 220 
Pa 2:7 8.5 1, 250 96 1, 200 4 50 
7. aay SSE iF 6.3 1, 040 99 1, 030 1 10 
20 EN Se 2.0 9.9 1, 160 100 1, 160 0 0 
Total___| 337.0 | 131.5 | 11,400 60 | 6,840 40 4, 560 
II 
F 380693 
Ficure 8.—Old-growth pine mixed with hardwood. Few areas 
of pure old-growth pine remain in the Upper Peninsula. 
The average volume per acre is only 8.3 cords. 
The restocking areas are almost exclusively jack 
pine type, and two-thirds have been classified as of 
poor density (less than 40 percent stocked). Of 
all types, pine is probably the most depleted 
(fig. 9). 
The aspen and scrub forests, which have 
developed largely at the expense of other types 
after logging, are in general immature (fig. 10). 
Only 3 percent of the area supports timber of 
sawlog size, and the few saw-timber stands average 
but 4,440 board feet per acre. Cordwood stands 
average 8.3 cords per acre and cover 25 percent of 
the aspen area. The rest is restocking, but more 
than half the restocking area is of poor density. 
