Western Larch Equation II: 



WLht = - 148.4 + l(WPSI) + 0.80 (A) + 1,400 (1/A) - 1,200 (1/WPSI) 

 - 38(WPSI/A) + 0.019(E) + 260,000 (1/E) + 3.1(CosAz) 

 + HT value* + TP value 4 



Abies / Pachistima — 9 



Thuja/ Pachistima -f"6 

 Thu ja-Tsuga/ Pachistima + 3 



Ridge 



Upper slope 

 Middle slope 

 Lower slope 

 Flat or beach 



+ 12 

 + 1 

 

 -1 



-12 



R 2 = 0.91; Sy = 7.1 feet. 



Lodgepole Pine Equation I: 

 LPht = + 15.8 + 0.81 (WPht) 



R 2 = 0.87; Sy = ±6.5 feet. 



Lodgepole Pine Equation II: 



LPht = — — 800(1/A) - 210(1/WPSI) + 0.016(E) + 170,000(1/E) 

 + 6(CosAz) + 0.66 (WPht) + HT value + TP value 



Abies /Pachistima +6 Ridge — 1 



Thuja/ Pachistima Upper slope —3 



Thuja-Tsuga/ Pachistima —6 Middle slope +5 



Lower slope +4 



Flat or bench —5 



R 1 = 0.93; Sy = ±5.2 feet. 



Douglas-Fir Equation I: 



DFht = + 69.3 - 500(1/A) - U00(1/WPSI) + 0.0108 (WPSI* A) 

 - 11(WPSI/A) 



R 2 - 0.92; Sy = ±7.6 feet. 



^Insert the appropriate value for habitat type and 

 topographic position as listed below each equation 

 in which they occur. 



T R*, the coefficient of determination, multiplied by 

 100 gives the percent of the variation in tree height 

 that is explained by the independent variables used, 

 Sy is the standard deviation from regression. 



4 



