14 



Table 10. — SmSrhsg height grmeth by types and regions. 



Age. 



"Drv slope." 

 Bartlett tract, 

 CoLfax County. 

 X. Mex. 



"Pure slope." 

 Flathead and 

 Missoula coun- 

 ties, Mont. 



Black Hills 

 National For- 

 est. South 

 Dakota. 



: Big Bug Mesa 

 1 6,500 feet ele- 

 vation. Pres- 

 cott National 

 Forest. Ari- 

 zona . - 



"Full light. " 

 Crane Valley. 



Madera 

 Countv. Cal. 



Height. Basis. Height. Basis. Height. Basis. Height. Basis. Height. Basis. 



Years. 



Trees 



Feet. Tree?. Feet. Trees. Fee*. 



Trees. ! 



2 



0.5 



3 





4 



9 





1.1 



6 



1.4 





1.7 



8 



1.9 



9 



o 2 



10 



2.4 



11 



2 7 



12 .. 



3.0 



13 



3.4 



14 



3.S 



15 



4.2 



16 



4.6 







Tetel.. 





0.1 



1.0 

 1.3 

 1.8 



2.4 



1.2 

 1.5 

 1.8 

 2.2 

 2.5 

 2.9 

 3.3 

 3.7 

 4.2 

 4.8 

 5.5 

 6.2 

 7.0 



1.2 



1 



1.6 



1 



2.0 



i 



2.6 



6 



3.1 







O. I 



, 



4.3 



10 



4.9 



12 



5.6 



11 



6.4 



19 



< . 3 



• s 



S.l 



17 



Feet. 

 0.1 

 .3 

 .6 

 1.1 

 1.7 

 2.3 

 2.9 

 3.5 

 4.2 

 4.S 

 5.5 

 6.1 



e.8 



Trees. 



4 

 10 

 12 

 37 

 43 

 19 

 16 

 22 

 24 



93 



Table 11 gives averages of height growth by types for seedlings 

 in Flathead and Missoula counties, Mont. Seedling growth is very 

 slow in mixed stands, because of the dryness of the mixed slopes and 

 the density of the mixed flats. On pure slopes and pure flats seed- 

 ling height growth is almost identical. 



Table 11. — Sei ~ ~" -Girth for various situation.; m Flathead and Missoula 



counties. Mont. 



Mixed slop' 



Mixed flat. 



Pure slope. 



Pure flat. 



±±'eisht . 





Height. Basis. Height. B i( sis. 3eigbt 





Total. 



Feet. 

 0.1 

 . 2 

 .4 



.9 

 1.1 

 1.3 



1.5 

 1.7 

 1.9 

 2.1 

 2. 2 

 2.4 



Internade 



90 



105 

 168 



100 



Feet. 

 0.1 



8 

 1.0 

 1.3 



1.5 

 1. S 

 2.1 

 2.4 

 2.7 

 2.9 

 3.1 



Internade 

 counts. 

 62- 



Feet. 

 • 0.1 



In tern ode 

 3 



Feet. 



0.1 



1.0 



11 



i.i 



1.3 



H 



1.4 



1.8 



11 



1.8 



2.4 





2.3 



2.9 



H 



2.9 



3.3 





3.7 



4.5 



















Internod< 



counts. 



18 



DIAMETER GROWTH. 



Table 12 contains averages of diameter growth from different 

 regions. The Black Hills region shows the slowest growth, due 

 mainly to lack of rainfall and a shorter growing season. Montana has 

 the next slowest growth, with possibly a slightly larger rainfall than 

 the Black Hills. Colorado and Arizona follow in order with approxi- 

 mately the same rainfall, but with longer growing seasons and more 

 open forest, which increase diameter growth. The growth in Stevens 



[Cir. 127] 



