Table 1.— Characteristics of released western redcedar stands 



Total stand characteristics 



Stand 



Trees 



Mean 



Mean 











Basal 



Stand 



No. 



tallied 



d.b.h. 



height 





Trees/per 





area 



CCF 







In 



cm 



Ft 



m 





Acre 



ha 



Ft 2 /acre m 2 /ha 





1 



851 



0.8 



2.03 



3.6 



1.10 





49,289 



121,793 



187 



17.37 



222 



2 



253 



1.0 



2.54 



12.0 



3.66 





7,060 



17,445 



40 



3.72 



55 



3 



148 



1.6 



4.06 



11.1 



3.38 





3,763 



9,298 



55 



5.11 



63 



4 



442 



1.4 



3.56 



9.6 



2.93 





12,448 



30,759 



118 



10.96 



169 



5 



314 



1.1 



2.79 



10.1 



3.08 





8,238 



20,356 



90 



8.36 



100 



6 



128 



1.7 



4.32 



8.1 



2.47 





3,320 



8,204 



51 



4.74 



59 



7 



352 



1.9 



4.83 



21.0 



6.40 





8,890 



21,967 



177 



16.44 



164 



3 



770 



1.5 



3.81 



7.2 



2.19 





20,742 



51,253 



246 



22.85 



230 



9 



473 



1.7 



4.32 



8.3 



2.53 





13,100 



32,370 



217 



20.16 



232 



10 



699 



1.2 



3.05 



6.2 



1.89 





20,178 



49,860 



153 



14.21 



148 



11 



322 



2.0 



5.08 



21.4 



6.52 





8,635 



21,337 



189 



17.56 



181 



12 



213 



2.3 



5.84 



22.6 



6.89 





5,563 



13,746 



153 



14.21 



164 



13 



348 



2.5 



6.35 



24.1 



7.35 





8,408 



20,776 



291 



27.03 



267 



14 



52 



2.0 



5.08 



16.2 



4.94 





1,296 



3,202 



27 



2.51 



30 



15 



163 



3.0 



7.62 



27.4 



8.35 





3,649 



9,017 



180 



16.72 



147 



Table 2.— Characteristics of growth-sample trees in released western redcedar stands 



Growth sample trees 

 5-in d.b.h. and larger 



Stand 

 No. 



Number 

 sampled 





Mean 

 d.b.h. 







Mean 

 height 





Mean b.h. 

 age 



Mean b.h. age 

 at release 







In 





cm 



Ft 





m 



Yr 



Yr 



1 



35 



9.1 





23.11 



46.9 





14.30 



69 



24 



2 



22 



9.7 





24.64 



44.0 





13.41 



64 



53 



3 



25 



14.6 





37.08 



65.9 





20.09 



65 



43 



4 



33 



9.4 





23.88 



47.6 





14.51 



78 



60 



5 



28 



13.4 





24.04 



72.7 





22.16 



77 



28 



6 



22 



8.9 





22.61 



35.1 





10.70 



36 



17 



7 



59 



23.4 





59.44 



90.4 





27.55 



94 



74 



8 



81 



21.1 





53.59 



89.8 





27.37 



94 



74 



9 



54 



11.7 





29.72 



66.6 





20.30 



57 



33 



10 



39 



11.0 





27.94 



69.9 





21.31 



89 



69 



11 



46 



12.1 





30.73 



68.3 





20.82 



147 



125 



12 



36 



13.6 





34.54 



64.8 





19.75 



71 



56 



13 



69 



31.8 





80.77 



111.0 





33.83 



84 



60 



14 



14 



6.5 





16.51 



34.3 





10.45 



72 



54 



15 



38 



24.6 





62.48 



120.2 





36.41 



169 



159 



PREDICTION OF NONRELEASED 

 DIAMETER GROWTH 



Nonreleased trees were not sampled in this study. 

 Therefore, diameter growth prior to the release treat- 

 ments was measured from the growth-sample trees and 

 used to construct a regression model to predict non- 

 released tree diameter growth. The independent vari- 

 ables that existed at the time of release were evaluated 

 as potential predictors of diameter growth (table 3). To 



determine the optimum slope and aspect for tree 

 diameter growth without repeated calculations, the sine 

 of the aspect azimuth times the percent slope [Sine 

 (Asp)* Slope] and the cosine of the aspect azimuth times 

 the percent slope [Cos (Asp)* Slope] were used as 

 independent variables (Stage 1976). If either the sine 

 transformation term or the cosine transformation term 

 was significant as an independent variable in predicting 

 diameter growth, they both remained in the regression 

 model. 



4 



