Table 2 — Regression models for predicting prerelease 10-year radial growth (inch) of trees less than 

 1.0 inch d.b.h. 



Variable 



Coefficient 



Probability 



Height 



Crown length 



Intercept 



R-square 



Error mean square 



F for model (Probability) 



Height 



Crown length 



Intercept 



R-square 



Error mean square 



F for model (Probability) 



Height 



Crown length 



Intercept 



R-square 



Error mean square 



F for model (Probability) 



Douglas-fir 



-0.004 

 .051 

 .039 



0.47 

 .01 

 42.92(0) 



Engelmann Spruce 



-0.038 

 .096 

 .043 



0.62 

 .01 

 76.35 

 Subalpine Fir 



-0.016 

 .079 

 -.001 



0.69 

 .01 

 103.41 



-1.02 

 5.91 

 2.95 



^.59 

 8.96 

 2.42 



-1.28 

 5.30 

 -.06 



0.309 

 



.004 



.018 



0.203 

 



.949 



u. 



X 

 H 



o 

 a. 



o 



»- 

 z 



(9 

 UJ 



z 



cc 

 >- 

 I 



0.0 



0.1 0.2 0.3 0.4 



PRERELEASE 10-YR RADIAL GROWTH, IN 



0.5 



Figure 1 — Relationship of 11 -year postrelease height growth of subalpine 

 fir, Douglas-fir, and Engelmann spruce to 10-year prerelease radial 

 growth. 



4 



