Grand fir 



Yields are summarized in tables 7 through 11 and fig- 

 ures 29 through 31. 



In comparison to Douglas-fir plantations, early yields 

 are lower for grand fir, but by 100 years the grand fir 

 yields are higher for all site index classes. 



Site indices for the simulations (figs. 32, 33) of grand fir 

 plantations are lower than for either the natural regen- 

 eration simulations or for the Douglas-fir plantations. 

 The differences are attributable to data for initial heights 



at age 5 represented in the Regeneration Establishment 

 Model. Planting effect in the initial height estimation 

 equation gives little height advantage to planted grand fir 

 compared to Douglas-fir. 



Mean d.b.h. of the grand fir plantations starts slower 

 than Douglas-fir but surpasses it in later years (figs. 34 

 through 38). Grand fir plantations always have trees of 

 larger diameter than the naturally regenerated stands, 

 which also contain a substantial proportion of grand fir. 



Effects of thinning regimes on standing volume are 

 compared in figures 39 through 44. Effects of thinnings 

 on total yield are compared in figures 45 through 50. 



Table 7 — Yields of grand fir plantations having 500 trees per acre surviving 5 years, no thinning 



Summary statistics 

 Volume per acre Removals per acre 



Merchant- Merchant- Merchant- Merchant- Growth 



Site Trees/ Total able able Trees/ Total able able BA/ Top MOW _ 



index Age acre volume volume volume acre volume volume volume acre CCF height PRD ACC year D 







Ft' 



Ft' 



Bdft 





Ft' 



Ft' 



Bdft 



Ft' 





Ft 



Vr 



Ft' 



Ft' 





5 



500 



















Q 







Q 



2 



\ 



5 



Q 



Q 







in 



447 



p 



















3 



g 



10 





n 

 \j 



U.D 



on 



371 



1 o 























3 



g 



1 2 



10 



■7 







1 2 



30 



316 



79 



























11 



23 



21 



10 



23 







2.5 



40 



292 



308 



48 



160 



















28 



52 



29 



10 



58 



1 



4.2 



50 



276 



872 



439 



1546 



















61 



100 



37 



10 



92 



4 



6.4 



60 



262 



1758 



1378 



5139 



















100 



147 



45 



10 



125 



10 



8.4 



70 



246 



2910 



2601 



10567 



















139 



184 



55 



10 



145 



19 



10.2 



80 



229 



4166 



3899 



17125 



















171 



211 



64 



10 



157 



31 



11.7 



90 



210 



5430 



5172 



24275 



















197 



230 



72 



10 



172 



45 



13.1 



100 



192 



6700 



6443 



31752 



















218 



243 



79 



10 



\11 



55 



14.4 



110 



174 



7916 



7656 



38998 



















234 



253 



87 



10 



182 



67 



15.7 



120 



158 



9072 



8809 



45868 



















247 



260 



93 



10 



182 



77 



16.9 



130 



143 



10126 



9862 



52038 



















256 



264 



100 



10 



185 



86 



18.1 



140 



130 



11108 



10844 



57695 



















263 



266 



105 



10 



182 



92 



19.3 



150 



118 



12004 



11741 



62725 



















267 



266 



111 















20.4 



c 



500 







Q 









Q 



Q 







Q 



2 



o 



c. 



c 



1 



n 

 u 



A A 







A 

 •» 



n 

 u 



n 



n 

 u 



A 



u 



u 



n 

 u 



c. 



c 



7 



1 u 



A 



A 

 U 



A n 







*tO 



n 





n 



V 



n 



n 



\J 



n 



7 



1 K 

 1 D 



1 7 



\ u 





A 

 U 



1 A 



on 



OXJ 



O'r't 





O 1 



107 



n 



n 



\J 





n 



u 



97 





ou 



1 u 



yj 



1 



'X n 



J.O 



40 



328 



1216 



735 



2580 



















80 



129 



41 



10 



176 



4 



6.7 



SO 



312 



2934 



2543 



9929 



















150 



207 



53 



10 



247 



21 



9.4 



60 



289 



5203 



4852 



21466 



















216 



265 



65 



10 



268 



51 



11.7 



70 



259 



7374 



7038 



33865 



















262 



299 



76 



10 



277 



82 



13.6 



80 



228 



9329 



8997 



45454 



















291 



318 



84 



10 



307 



114 



15.3 



90 



198 



11255 



10921 



56820 



















313 



329 



93 



10 



298 



130 



17.0 



100 



174 



12935 



12603 



66608 



















327 



334 



101 



10 



316 



155 



18.6 



110 



151 



14543 



14211 



75669 



















337 



336 



109 



10 



307 



163 



20.2 



120 



133 



15989 



15658 



83652 



















344 



337 



116 



10 



296 



168 



21.8 



130 



118 



17271 



16942 



90581 



















348 



335 



123 



10 



289 



175 



23.3 



140 



105 



18408 



18083 



96624 



















350 



332 



129 



10 



294 



182 



24.8 



150 



93 



19534 



19210 



102513 



















352 



330 



135 















26.3 



5 



500 



































2 



3 



5 



1 







0.0 



10 



459 



6 



























2 



6 



8 



10 



8 







1.0 



20 



406 



80 



























11 



24 



21 



10 



64 







2.2 



30 



366 



717 



321 



1175 



















55 



91 



36 



10 



208 



1 



5.2 



40 



351 



2789 



2335 



9459 



















149 



206 



55 



10 



347 



17 



8.8 



50 



323 



6086 



5695 



26543 



















252 



302 



70 



10 



400 



67 



12.0 



60 



284 



9408 



8994 



44885 



















319 



354 



85 



10 



352 



120 



14.4 



70 



245 



11718 



11324 



58472 



















353 



377 



91 



10 



428 



174 



16.3 



80 



207 



14256 



13869 



73051 



















379 



387 



100 



10 



374 



187 



18.3 



90 



178 



16122 



15735 



83469 



















391 



390 



110 



10 



431 



237 



20.1 



100 



150 



18068 



17689 



94258 



















401 



390 



117 



10 



417 



239 



22.1 



110 



129 



19846 



19469 



103758 



















407 



388 



124 



10 



376 



231 



24.0 



120 



113 



21302 



20927 



111471 



















410 



385 



130 



10 



367 



236 



25.7 



130 



101 



22611 



22240 



118360 



















412 



382 



136 



10 



386 



246 



27.4 



140 



89 



24022 



23651 



125692 



















415 



379 



142 



10 



388 



256 



29.2 



150 



79 



25343 



24974 



132570 



















417 



377 



148 















31.0 



25 



