JACK PINE. 11 
Taste 3.—Rate of growth in diameter of second-growth jack pine vn northern Minnesota, 
nnn nnn SU Eni EIIEnISInEIInINI AN IIISIOEEEESERREE RRR! 
| Diameter breast high. || Diameter breast high. 
Age. Age. 
Maximum.| Average. Maximum.| Average. 
| 
Inches. Inches. Years. Inches. Inches. 
Ba adacouspdS dose beonseddullsseeun0 2 adon|lppecocdousgs sess sdooesdsodouggceuded Deitel 5.7 
1.8 1.2 Ris GudosuucessoovoBDEopauC 8.6 6.5 
3.6 2.5 A reiotatcistererate wiske mis erchersiciniece(s 9.5 7.3 
Dae 3.8 CG EP Nee ec a na a 10.3 8.1 
6.5 4.8 OO eaten cya ee years ata 8.9 
Notr.—Based on decade measurements on 46 1-foot stumps 32 to 51 years old. Measurements by J. St. J. 
Benedict, in Cass County, Minn. 
Tape 4.—Rate of growth in diameter and height of dominant jack pine trees in Craw- 
ford and Roscommon Counties, Mich. 
pa: coe Maximum growth. cc ora Maximum growth. 
oats Diamet ee nace Diamet 
iameter Total iameter| = mota] jiamete Total iameter mora] 
breasty |e: breast : breast =e breast : 
high. height. high. height. high. height. high. height. 
fr || | 
Years. | Inches. Feet. Inches. ie Years. Li en es Feet. Puch. Feet. 
2 E .! 67 
neoodsec||soscsaenca! | 4 274 lecbaeccacd OOmeceee 8 3) 11. 
ease 0.8 8 1.5 13 UEP eens 8.8 58 11.5 70 
LOeeSocges 2.0 15 3.2 22 cgone 9.2 61 12.0 12 
NS eae 3.1 22 4.8 bl BOS Barca 9.6 63 12.4 74 
Dp aise 553 4.2 28 6.3 39 WOmseee 10.0 64 12.8 75 
Des eis 5.2 34 7.5 45 SO Raa 10.3 65 13.1 76 
BBs. css 6.0 39 8.4 51 BOR ec ers 10.7 66 13.5 77 
Oe ise 6.7 44 9.3 56 MWe ssooe iti 67 13.9 75 
BD aaease 1.3 48 9.9 61 YEAR See 11.5 67 14.3 79 
BOs ce qo 52 10.5 64 NWS seose 11 8 68 14.7 80 
Diameters based on decade measurements on 122 1-foot stumps 25 to 104 years old. It was assumed 
that it would take 4 years to grow to a stump height of 1 foot. 
Heights based on sectional age counts on 150 trees 25 to 104 years old. 
Measurements by T. H. Sherrard, 1901. 
TABLE 5.— Measurements' on 13 trees in a dense young stand of jack pine on sandy pine 
plain in the Upper Peninsula of Michigan. 
(The trees were cut for pulpwood in 4-foot lengths and taken to a top diameter of 4 inches, with an 
average of 122 pieces per cord. See Pl. XIL.] 
| 
Average. | Maximum.| Minimum. 
ASE i pee pt cera tea Yu tay ata atataraVoVats tae Pure a evebeieot a alae tare ie ialawe aid eiaa mnoveroioieie years 47 55 40 
POL OIG sto ote rerararotele ic ale ictsaces wyoie wide leve eter eee ee eaters ovals wate esas feet .. 50.8 7 44 
AD AIBN ORIEN SVE OTHE SI rh CH= BI nt ar Mia airs are lee Pe i er eee ee inches. . 6.9 9 5.5 
Volume in board feet (possible mill cut of round-edge material). .... 28 60 15 
CSIR Sra by Ga ee Ale Sa eee i a alas oe et a ee Ep feet. . 0 0 0 
WUGTHODE TOT EEY ON VEL Sya feat aha a eae eR aes ag a a feet. . 31.6 44 24 
Nim ber:OT-A-fOOCSTICKS Ment EO avec cic a0! Liclcrarer0jpvelarcidcasoccrmyersialenoyeye ¢ 205 ie 8 il 6 
1 Measurements by Huber C. Hilton, 1918. 
