Development of Stand Volume Tables 



Stand volume tables are usually developed from multiple-stand samples. The tables 

 included here are based upon single-stem volume equations which, when extended, pro- 

 vide the tabular values. The procedure used in the development of the equations con- 

 sisted of regressing total stem volume against the product of basal area and total 

 height for each tree. The intercept term was dropped and the regression coefficient 

 was used as an estimate of cylindrical form factor. Because the form factor decreases 

 with increasing d.b.h., the factor used to develop the tables represents those trees 

 in the diameter class interval of 4 to 10 inches. The tabular values are obtained by 

 the formula: 



V = KBH 



where V = total stand volume . 

 K - form factor 



BH = basal area of the stand multiplied by the average height of the trees 

 sampled for basal area. 



The factors for the four species are: 



Species Factor 



Ponderosa pine 0.36 



Western larch .36 



Douglas-fir ■ .40 



Lodgepole pine .46 



The only published stand volume tables existing for the species and locale in- 

 volved in this study are for lodgepole pine (Cole 1971) . A comparison between the two 

 tables shows remarkable agreement, suggesting that the approach used here is worthy of 

 application for the other species until such time as conventional stand volume tables 

 are developed. 



TABLES FOR VOLUME ESTIMATION 



The Tables 



In the appendix of this paper, volume estimation tables are presented for four 

 species- -ponderosa pine, lodgepole pine, western larch, and Douglas-fir. In all 

 tables, diameter classes indicated are based on midpoint measurements; e.g., the 6-inch 

 class includes trees 5.5 through 6.4 inches in diameter. The tables include: 



1. Standard volume tables: --These tables contain estimates of total gross cubic- 

 foot wood volume for the entire stem, inside bark, including stump and top. They are 

 intended for use as standard volume tables. 



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