JACK PINE, 
TABLES. 
BO 
TaBLE 17.—Proportion of the occurrence of jack, Norway, and white pine stands on 
different soils in northern Minnesota classified according to the prevailing size of their 
soil particles} 
Class of soil. 
PUTO VeTA Vel.) 2-0 tO pln erase ae rele nelerelaie = 
Coarse.sand, Wo O:Simimes oan a sees 
Medium sand, 0.510 0.25mm.......-...--- 
Minesands Ohara OM mimes eee e eee ee 
Very fine sand, 0.1t0 0.05 mm-..-..........- 
STO oto OLONb mmr eeriee ee eee 
Clay OlOOSi mar eee eye eer iam tee eters 
1 From unpublished preliminary report on Norway pine in Minnesota by H. H. Chapman. 
Jack 
pine 
stands. 
Per cent. 
i Gh Ee Rr SN A PR NO 1.1 
Norway 
pine 
stands. 
Per cent. 
White 
pine 
stands. 
Per cent. 
Dw 
ClReRnNawo 
S| SShaRws 
— 
So 
Based on 
mechanical analysis by the Bureau of Soils of a large number of soilsamples from different jack, Norway, 
and white pine stands. 
TABLE 18.—Average width of crowns of predominant jack-pine trees of different ages 
and diameters, with enough light for good crown development, and growing in compara- 
tively dense, even-aged stands. 
{Measurements by H. H. Chapman in Hubbard County, Minn., 1905.] 
Age. 
Site quality ‘‘good.”’ 
Average Average 
Site quality ‘‘poor.”’ 
diameter ae Basi diameter Width F 
oneast (0) asis. Breast of Basis 
hich. crown. high. crown. 
Inches. Feet Trees. Inches. Feet Trees. 
1.8 ih bs ee ae re eal Pa yh sees Ne ee 
i555 11 1 3.9 G3) Rese ee 
7.9 14 9 5.9 9 5 
9, 4 16 38 7.4 11 19 
10.8 18 18 8.7 12 3 
12.0 22 4 9.9 14 35 
ele a Eat itor hs ae 6] ie el doco 10.9 15 13 
Pe SESE ai fe ON Ma Rr TS BID 11.8 16 8 
ae Sige a AI ESI ae ey oe eam area rou Ae 18 5 
cs Se S| OEP ISE CHEE rete s ReeneS e [esp gnt OR ee 19 1 
Seas ths ha poset te Meee | Se) Aerena Eee Dols aoe eee 
Een ete Baap be Hea (et uke opie NEM Cf Pi ep esata eS 
TAS ie i AAI Eas hs Be Li ee Ab ae gc 27 2, 
70 91 
