JACK PINE. 116 
Table 4 indicates the average dominant and the predominant 
growth on jack-pine land of good quality in the northern part of the 
Southern Peninsula of Michigan. 
Tables 5 and 6 indicate the development of jack pine in dense 
stands on good sites in the southern part of the Upper Peninsula of 
Michigan. 
Table 7 indicates the rate of growth on good sites in western 
Ontario, a region very favorable to the growth of jack pine. 
Table 8 shows the growth on poorer soil in Manitoba. 
Tables 9 and 10, which are not comparable with Table 1, being 
based on different data, show the average growth and yield at dif- 
ferent ages of dense, even-aged, unmanaged stands of Jack pine on 
sandy sale in Habart! Cine Minn. These stands have been 
more or less damaged at one time or another by ground fires which 
were not quince severe to kill many trees, but which without 
doubt appreciably lessened the vitality and rate of growth of a large 
number of them. 
TABLE 9.—Rate of growth and yield per acre of pure, even-aged, densely stocked stands of 
jack pine in Hubbard County, Minn. 
SITE QUALITY “GOOD.”’ 
Average. 
Trees per acre. eee 
asa 
D.b.h 
rea. 
Age. apt Domi- | Yield 
nant per 
Total, | Sinches |10inches| 5 inches | 5inches | height. | acre.t 
and over.| and over.| and over. | and over. 
Years. Number.| Number. | Number.| Sq. ft. Inches. Feet. Cu. ft. 
DA fe ee a A Ae pa ne NS Ra OR Oe 1,120 Oy Al Lae aes 15 5.4 30 730 
IAB Ee eat ys hte OS IM UES 839: dea Yi sea tes a 28 5.8 ol 1,090 
Sh (err ce ie yee neg Dns 672 Theil bes Ne ote ep eeeaa a een 57 6.1 43 1,630 
IS CI EEO Se ee ee Soe 565 391 7 90 6.5 48 2,480 
01 9 Vay athe RR ae eS a ea ea 485 404 26 102 6.8 52 2,970 
7. yes 2p 4 lee ea Site et dies ED & Ver TM enn 432 393 39 108 eal, 56 3, 260 
ES Oe gate Saree. Ad merece vane a 6 aaa a 398 382 45 lil Wed 60 3,470 
Gi eacr s Aine ties ea A ei ene 374 371 48 114 Tow 63 3, 660 
GOR eee ree ee 358 358 51 115 hed. 66 3, 840 
Tea a ir ie ee ean AS ke oe 345 345 53 116 (lowe 69 4,010 
FOR many see are 332 332 53 116 8.0 71 4,180 
SITH QUALITY “POOR.” 
| 
DOE a, MON Head Deere ERC a Ne hohe Ty 1,400 OTR Sek ers oes 10 oul 29 660 
SOM ERE RE ee Mey ee Cee 1, 091 SS ieee ae 22 5.4 35 930 
She Ne eure See ee ea Re 7 846 203cs ass eae 36 Dd 40 1, 250 
AQ Sas aera iae, SIAR eet ee 698 G7) we) ek a eG 53 5.9 44 1,590 
ADE htt 3O0 mers den ho te i ee et 602 SF YO el i Des ae os FE 67 6.1 48 1,900 
15 fe Tee abe eer ec eats SMO ced ae 537 SOO) SiMe eseee 78 623 51 2,180 
DOs oe at ae One Pee eh ae 490 373 6 86 6.5 54 2,430 
GOs le ea ae, en ee 450 376 17 92 6.7 56 2,660 
Gime a Ral 0 See hp ein heey. 412 374 25 97 6.9 58 2,870 
AV Se ee ES IRE Brenan 377 364 | 30 100 (oat 60 3, 080 
| 
1 Total volume, including bark, of all trees 2 inches and over in diameter, breast high. 
Based on 128 plots; area, 90.2 acres. Measurements by H. H. Chapman. 
