TABLE 4 



Average number of trees, average diameter, and average volume, by 

 tree classes and species. 



'It* <D I <W rQ H j_ . 



dco> 5jo o og- ^ o p3 o> S 



5 o k cj U oj o si, _, $ 



^ - ""* " W ^ .H' Ol U^ ' 



^ C s-'O SCQ a;S 



*- ^1 6 ' Is 



Species. ^^ ^-^^ o-cS s^, Q s^ Q |^ 



IM 2 O_jH '"'n Q)Q Z^ri K. .. ., 



S *S "3 ^ rj OJ 



5 o I o I 2 



QQ-S HPH 



P 



p 



Inches Bd. Ft. Per Acre Bd. Ft. Per Acre Bd. Ft. 

 Plot 1. Average for a 4 acre plot. 



9.50 53,012 



24.50 30,814 



13.75 43,003 



1.50 2,711 



49.25 129,540 



9.66 80,203 



34.00 54,415 



4.66 20,635 



.33 267 



48.66 155,520 



Average yield per acre of mature noble fir, Douglas fir, and western 

 hemlock on Larch Mountain. Averages for 17^4 acres. 



Diameter of 



Total trees Basal area average tree. Yield per acre. 



Species. per acre. sq. ft. Inches. bd. ft. 



Noble fir ...... . ____ 10 127 47.6 69,415 



Douglas fir ......... 7 66 42.0 22,268 



West. Hemlock ____ 40 146 25.9 49,427 



All Species ........ 57 339 30.4 141,110 



Note. Data are for trees 12 inches or more in diameter at breast height. 

 Noble fir utilized to a top diameter of 15 inches inside bark. Doug, fir utilized 

 to a top diameter of 10 inches inside bark. Hemlock utilized to a top diameter 

 of 8 inches inside bark. 



No data were obtained concerning the yield of second growth stands of noble 

 fir in the course of this study. 



Lumbering 



The logging of noble fir of the extreme size found on this tract 

 presents an enormous amount of waste, caused mainly by breakage in 

 felling the trees. This breakage is unavoidable in many instances, as a 

 great deal of care was exercised by the fellers in placing the trees in 

 felling them. In addition to the breakage, there must be made a con- 

 siderable deduction for defect, especially in the larger trees. In some 

 instances it was necessary to cull the butt log of the larger trees, the rot 

 in them extending up some 20 to 30 feet from the stump. Ring shakes 

 were prevalent, scarcely any of the larger trees being found free of them. 

 It is estimated that the deduction for defect and breakage will amount 

 to from 20 per cent to 30 or 40 per cent of the total contents of the 

 trees as given in Table 6. 



Volume 



Noble fir, due to a full cylindrical bole and its comparatively thin 

 bark, bears a greater volume for its diameter and height than any of 

 its associating species, with the possible exception of western white 



53 



