Table 37. — Current and potential net annual growth, 1 lumber tally, in the ponderosa pine region, by unit 





Current annual net growth 



Potential annual net growth 



State and unit 



Area 



immature 



stands 



Total 



net 



growth 



Growth of 

 ponderosa 



pine as 



portion of 



total 



Area 

 commercial 

 forest sites 



Total 



net 



growth 



Growth of 

 ponderosa 



pine as 



portion of 



total 



Eastern Washington- 



Chelan- Col ville — 



Thousand 

 acres 

 1,103 

 713 

 162 



Million board 

 f eet 

 70.4 

 55.0 



7.7 



Percent 



33 

 40 



25 



Thousand 

 acres 

 3,525 

 2,177 

 288 



Million board 



feet 



448.8 



376.2 



39.6 



Percent 



55 





45 





49 







Total 



1,978 



133.1 



35 



5,990 



864.6 



51 









Eastern Oregon: 



799 

 401 

 457 

 482 



42.9 



17.6 

 19.8 

 27.5 



37 

 77 

 75 

 69 



2,244 

 2,016 

 2,925 

 2,993 



286.0 

 277.2 

 370.7 

 442.2 



64 





84 





86 





86 







Total - 



2,139 



107.8 



59 



10, 178 



1, 376. 1 



81 









4,117 



240.9 



48 



16, 168 



2, 240. 7 



69 







1 Growth in board feet is shown for all trees 11.1 inches d. b. h. or more, estimated in 16-foot logs to 8-inch top. Scribner rule. 

 Table 38. — Periodic net saw-timber growth, 1 lumber tally, in the ponderosa pine region, 1936-65, by unit, decade, and class of cutting practice 



[In million board feet— i. e., 000,000 omitted] 





1936-45 



1946-55 



1956-65 



State and unit 



50-50' 



75-50' 



95-75 ♦ 



50-50' 



75-50' 



95-75* 



50-50' 



75-50' 



95-75 « 



Eastern Washington: 



Chelan-Colville 



846 



607 

 85 



803 

 575 

 82 



731 



535 

 76 



1,412 

 977 

 172 



1,296 

 893 

 161 



1,058 

 771 

 145 



1,864 



1,244 



246 



1,724 



1,150 



229 



1,364 



Yakima River 



971 





207 







Total 



1,538 



1,460 



1,342 



2,561 



2,350 



1,974 



3,353 



3,103 



2,542 



Eastern Oregon: 



North Blue Mountain 



440 

 390 

 298 

 717 



418 

 337 

 270 

 616 



390 

 259 

 220 

 437 



896 



846 



723 



1,616 



809 



723 



627 



1,284 



714 

 491 

 451 

 794 



1,220 

 1,215 

 1,103 

 1,979 



1,091 



1,065 



961 



1,749 



944 



744 



South Blue Mountain 



692 



Klamath Plateau .. 



1,116 







Total 



1,845 



1,641 



1,306 



3,980 



3,443 



2,450 



5,517 



4,866 



3,496 









3,383 



3,101 



2,648 



6,541 



5,793 



4,424 



8,870 



7,969 



6,038 







' Growth is shown for all trees 11.1 inches d. b. h. or more, estimated in 16-foot logs to an 8-inch top, Scribner rule. 



I This is the estimated periodic growth if the anticipated timber cut in ponderosa pine types takes the form of light selection, removal averaging 50 

 percent of virgin stand volume per acre on all areas where cutting occurs. 



Km imated periodic growth if the anticipated timber cut in ponderosa pine types takes the form of heavy selection on privately owned lands, removal 

 averaging 75 percent of virgin stand volume per acre; light selection averaging 50 percent on other lands. 



1 Estimated periodic grow th if the anticipated cut in ponderosa pine types takes the form of virtual clear cutting on privately owned lands, removal 

 averaging 95 percent of virgin stand volume per acre; heavy selection averaging 75 percent on other lands. 



95 



