50 



BULLETIN 234^ IT. S. DEPARTMENT OF AGRICULTURE. 



Table 23. — Average contents in cubic feet, to a top diameter of from 2 to S inches in- 

 side bark and in board feet (Scribner Decimal C rule) to a top diameter of 6 inches inside 

 the bark, of lodgepole pine trees of various diameters and total heights, Deerlodge and 

 Gallatin National Forests, Mont. 



Di- 

 ame- 



Total height of trees in feet. 



ter 

 breast 

 high. 



30 



40 



50 



60 



70 



80 90 100 



Ins. 

 3 



aft 



1.0 



1.5 

 2.1 



2.7 

 4.0 

 4.8 



B.ft. 



Cu.ft. 

 1.3 

 1.7 

 3.0 

 3.3 

 5.5 

 7.5 

 8.9 



B.ft. 



20 

 25 



Cu.ft. 



1.8 



2.2 



4.0 



5.1 



7.3 



9.5 



11.0 



12.5 



14.0 



17.0 



21.0 



Bd.ft. 



Cu.ft. B.ft. 



Cu.ft. 



1 

 Bd.ft. Cu.ft. 



1 

 Bd.ft. Cu.ft. 



I 

 Bd.ft. Cu.ft. Bd.ft. 



4 















5 



10 

 30 

 35 

 45 

 60 

 70 

 90 



5.4 

















6 



6.0 

 9.6 

 11.4 

 14.2 

 16.6 

 19.9 

 22.2 

 26.0 

 30.0 



30 



40 

 50 

 60 



70 

 85 

 105 

 125 



8.0 

 11.2 

 14.0 

 17.0 

 20.0 

 23.0 

 26.8 

 30.6 

 34.2 

 38.4 

 42.5 

 46.5 

 51. 5 

 56.0 

 62.0 













7 



40 



50 



60 



75 



90 



105 



130 



155 



180 



205 



230 



250 



275 



300 











8 



15.8 

 19.1 

 23.0 

 27.4 

 32.0 

 37.0 

 42.0 

 47.0 

 52.0 

 57.0 

 62.6 

 68.0 

 73.0 



60 

 75 

 90 

 105 

 130 

 160 

 190 

 220 

 250 

 280 

 315 

 350 

 385 







9 









10 













11 















12 









- 



36.0 

 42.0 

 48.0 

 55.0 

 61.0 

 67.5 

 74.0 

 80.0 

 87.0 



165 i 



190 ' 



230 58. 

 270 65. 5 

 310 79. 9 

 350 79. 

 390 86.0 

 430 93. 

 470 100.0 





13 













14 













290 



15 













340 



16 

















395 



17- 

 18 

 19 

 20 















450 



















510 

















600 

























1 











Table 24 shows the contents in board feet and props of trees of various diameters on 

 three different quality sites in the Arapaho National Forest, Colo. In applying this 

 table to any given stand, the heights of a few trees of different diameters should be 

 measured and compared with the heights given in the table, in order to determine 

 the site quality of the stand being measured. If, as estimating progresses, the average 

 height of the stand changes materially, new height measurements should be taken 

 and the figures applicable to the new site used. This table is based on 1,275 trees 

 cut from overmature stands (about 200 years old) of moderate density. The height 

 of a tree of a given diameter varies with its age, while the relation between its diameter 

 and height, and consequently between its diameter and volume, varies with the 

 density of the stand. Height alone, moreover, does not determine site quality. 

 For these reasons the table is applicable only to the region in which it was made and 

 to stands similar to those in which the figures were secured. Tables based on diameter, 

 and total height, or diameter and number of logs, have a much wider application. 

 The present table allows 8 per cent of defect for old timber, but if unusually defective 

 timber is encountered additional allowance must be made. The volume in board 

 feet includes all of the tree from a stump height of 1 foot to a diameter of 6 inches in 

 the top; the remainder of the tree down to a diameter of 5 inches in the top is given 

 as prop material, expressed in linear feet. 



