ERRATA SHEET 



022966183 



Hann, David W, , and B. Bruce Bare. 



1978. Comprehensive tree volume equations for major species of 

 New Mexico and Arizona: I. Results and Methodology. USDA 

 For. Serv. Res. Pap. INT- 209, 43 p. Intermt. For. and Range 

 Exp. Stn. , Ogden, Utah S4401. 



Page 9 



Table S .--Forked tree merchcmtahle gross cubic foot volume data base 



and regression results 



Independent variables 



= Top diameter, inside bark, in inches 



D = D.b.h. in inches 

 H = Total tree height in feet P = Height to first fork divided by H 



T = 1 + (number of forks) 



Species, National Forest, and regression equations 



Number 

 of 



observations 



Relative 

 :mean squared 

 residual 



(RMSQR) 



IVhite pine on Lincoln, Santa Fe, and Carson 



R 



Co 



C, 



= Co + CiH 



101 



0.9581 



= 0.61725167 + 0.042365845D 



= 0.00598501 - 0.00073445D 



or 



m 



R . = 1.04518089 - 7 . 88395198E-07D^ + 8 . 39079873E-08D^ 



Engelmann spruce-corkbark fir on Lincoln, Santa Fe, and 

 Carson 



R . = 1.15372135 - 1 . 51067496E-08D^ 



Ponderosa pine on Coconino, Tonto, Lincoln, Santa Fe, 

 and Carson 



0.023300125D_ + CqT^ + Ci? 



m 



R , = 0.997113216 



Co = 0.00564984 + 0.00079885D 



^ iri 



91 



937 



9761 



. 1 



= 0.002886816 + 0.02330013D 



or 



m 



R . = 1.01577735 - 1 . 68401856E-06D= 

 Douglas-fir on Lincoln, Santa Fe, and Carson 



R 



= 1.04417090 - 9. 53965362E-09*D 



Aspen on Santa Fe and Carson 



R . = 1.07666448 - 1 . 1S133616E-03D- • ^ 



White fir on Santa Fe, Carson, and Lincoln 

 \ ^0 * Ci(H/D2) 



Cn = 0,673711298 + 0.053948391D 



118 



184 

 74 



7286 



= 1.709640750 - 0.348134538D 



or ^ 



R , = 0.983293776 - 2 . 40166266E-05D^ 

 m, r ^ 



