Table 27. — Comparison of current annual growth and drain 

 SAW TIMBER (MILLION BOARD FEET) 



State and unit 



Current 



gross 

 growth ' 



Normal 

 mortality 

 depletion 2 



Current 



net 

 growth 3 



Average 

 fire loss 

 1924-1935 



Average 

 cutting 

 depletion 

 1925-1936 



Annual re- 

 duction in 

 saw-timber 

 volume 



Potential 



increase 



in net 



growth 



Eastern Washington: 



228 



202 



IS 



164 



152 

 8 



64 

 50 



7 



49 

 6 



161 

 145 



21 



146 

 101 

 14 



344 





292 





29 









Total 



445 



324 



121 



55 



327 



261 



665 







Eastern Oregon: 



133 

 162 



157 

 248 



94 

 146 

 139 

 223 



39 

 16 

 18 

 25 



1 

 11 



7 

 13 



113 

 257 

 133 

 429 



75 

 252 

 122 

 417 



221 





236 





319 





377 







Total - - 



700 



602 



98 



32 



932 



866 



1, 153 









1,145 



926 



219 



87 



1,259 



1,127 



1,818 







ALL STANDS (MILLION CUBIC FEET) 



Eastern Washington: 



71 

 59 

 9 



39 



33 



3 



32 

 26 

 6 



26 

 2 



30 

 26 

 4 



-24 

 -2 

 +2 



108 





78 





6 









Total - 



139 



75 



64 



28 



60 



-24 



192 







Eastern Oregon: 



54 

 46 

 47 

 55 



25 

 30 

 31 

 42 



29 

 16 

 16 

 13 





21 

 47 

 24 



77 



+8 

 -34 



-9 

 -67 



61 





3 



1 

 3 



63 





94 





110 







Total 



202 



128 



74 



7 



169 



-102 



328 







Region total - - 



341 



203 



138 



35 



229 



-126 



520 



1 On commercial forest land, 1936. 

 1 Insects, disease, wind throw, etc. 

 3 On commercial stands not more than 160 years in age, 1936. 



Klamath Plateau, the principal lumber-producing 

 units, and potential growth in cubic volume 

 exceeds recent depletion by a substantial margin 

 in every unit. 



Despite the favorable spread between recent 

 cut and physical growth capacity of the region as 

 a whole, it is conceivable that that portion of the 

 potential growth that proves to be economically 

 accessible may fall short of future needs because 

 much of the remote forest land is unsuitable for 

 ntensive management. 



Local Trends in Sow-Timber Growth and Depletion 



Cutting of saw timber assumed for the decade 

 1936-45 exceeds the 1925-36 average rate by 

 about 39 percent, in general conformity with the 

 increase in timber cut since 1934. As supplies of 

 privately owned timber diminish, a larger propor- 

 tion of the timber cut will come from public and 

 Indian lands. For the bulk of such lands the cut 

 is limited to volume that can be sustained without 

 serious interruption. Hence a reduction in cut is 

 assumed for the 20-year period following 1945. 



51 



