40 BULLETIN 820, U. S. DEPARTMENT OF AGRICULTURE. 
TABLE 22.—Average diameter outside bark at different heights above the ground for jack 
pine trees of different diameters on quality ‘‘ poor” and quality ‘‘good” sites, in Hubbard 
County, Minn., for trees grown mostly in dense, even-aged stands 18 to 78 years old on 
quality “‘poor,” and 20 to 45 years old on quality “‘good” sites. 
[Measurements by H. H. Chapman, 19905.] 
SITE QUALITY “POOR.” 
Height above ground (feet). | 
Diam- | 
oe 1 | 9 | 17 | 25 | 33 | 41 | 49 57 | Basis 
high. 
Diameter outside bark (inches). 
Inches | | | Trees 
1 1.7 0.9 NE. Pica ees a hy oe ae | Sane [aes BE it Foam ae 1 
2 2.8 128 Feo ene eee eee eters (ee. eee {rie eaecam li 
3 3.9 2.8 2.1 er a) ene Eee [ee alee | Sees 22 
4 5.0 3.7 3.0. Date se esas oe ae. lorie Bear ees See 30 
5 6.2 4.6 3.9 a1 Sy Pee es [Eon Seek [ela use 55 
6 7.3 5.5 4.8 4.0 Bats Parent ee |e Pe aul ee 43 
7 8.4 6.4 5.7 4.9 4.1 Ze Sere eS Bee 60 
8 9.6 | ~ 7.4 6.6 5.8 4.9 2d fei ees Ns eer 37 
9 10.7 8.3 7.4 6.6 5.8 4.7 Ral An eres 28 
10 11.8 9.3 S53 7.5 6.6 5.4 SRA! In 25 
11 12.9} 10.3 9.2 8.3 7a 6.0 AAD ole OPT i4 
12 13.9 1127) 10:4 9.1 8.0 6.6 5.0 ano 9 
13 14.9 12.2 11.0 10.0 oe 7 Fibs 5.6 SEY gs Mera tse 
14] 15.9: |-—1341 14-98 10-75 | 0 pr 6-1 42 3 
15 16.9 14.1 12.8 11.5 10.0 8.3 6.6 4.6 1 
16 18.0 15.0 13::7 12.3 10.7 8.8 7.0 Ta il bee eee 
st Ree Ce ie Meee (HUE) RO Efe eG) eas ee ee in ZS 
| 342 
SITE QUALITY “GOOD.” 
| l 
2 2.7 47 1c se eee eee fe seen oe fi Se 2 
3 3.9 2.6 7 Wi ROGAN ol Kg et CN | ante oo [ee en {ec ean 8 
4 5.1 3.6 2.9 2.3 Tec (eee eu (es Ee 26 
5 6.3 4.6 S58 3.0 DAV |e gel (i ae ia 30 
6 7.5 5.5 4.6 3.7 DAG nee A ee ome 26 
7 8.6 6.4 5.4 4.4. 3:2 TRC ipl ees ed ed eee te 34 
8 9.8 723 6.2 5.1 S47 Oe ae je RN 18 
9 10.9 8.2 7.0 5.8 4.3 DAG eae eees SS 22 
10 12.0 9.0 7.8 6.5 4.8 DS ee ato fecrete ae” 19 
ll 13.0 9.9 8.6 722 5.4 S35 oes eee 7 
128) 14.931 10:8 9.3 7.8 6.0 S10: | = eae eget a 4 
13 15.2 11.7 10.1 8.5 6.6 26s 2. ee eee 6 
14| 16.3 12.6 10.9 9.2 7ae3 Ce Ye (Pitas ea See 3 
5a |ee daess |e 3/5, een 7 9.8 7.9 Gs 14 eee [Pe ze Sal ceek eee 
16 18.3 14.4 12.5 10.5 8.6 628 Eee ae [nie aa 2 
| 
| | 207 
