ERRATA SHEET 



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, 45 p. Intermt. For. and Range 

 Exp. Stn. , Ogden, Utah S4401. 



Page 9 



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



avA regression results 



Independent variables 



D = Top diameter, inside bark, in inches 

 m 



D = D.b.h. in inches 

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



T = 1 + Clumber of forks) 



Species, National Forest, and regression equations 



Number 

 of 



' observations 



Relative 

 :mean squarec 

 residual 



fRMSORl 



IVhite pine on Lincoln, Santa Fe, and Carson 

 R , = Cn + CiH 



Co' = 0.61725167 + 0.0425658450^ 



Ci = 0.00598501 - 0.00075445D 

 ^ m 



R , = 1.04518089 - 7. S8595198E-07D ' 



,7] - 



101 



0.9581 



or 



8.59079875E-08D3 



m 



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

 Carson 



R__ = 1.15572155 - 1 . 51067496E-08D3 



m 



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

 and Carson 



R^ _, = 0.997115216 - 0.0255001250^ + CqT' + CiP 

 Co ' = 0.00564984 + 0.00079885D 

 Ci = 0.002886816 + 0.02550015D 



m 



R . = 1.01577755 - 1 . 6840 1856E-06D^ 



91 



957 



9761 



or 



Douglas-fir on Lincoln, Santa Fe, and Cars on 



R , = 1.04417090 - 9. 55965562E-09'D- 



,77^ - r. 



Aspen on Santa Fe and Carson 



R ,= 1.07666448 - 1 . 18155616E-05D- • ^ 



71 



White fir on Santa Fe, Carson, and Lincoln 

 R^^, = Cq . C^CH/D^) 



118 



184 

 74 



7286 



Cq = 0.675711298 



C 



0.0559485910^ 

 = 1.709640750 - 0.548154558D 



or ^ m 

 R , = 0.9852957:'6 - 2 . 40166266E-05D'^ 



