Table 19. — Summary of total average annual depletion, in saw timber and in all stands by State and forest-survey unit, depletion agency, 



and species group 



STANDS OF SAW-TIMBER SIZE (IN MILLION BOARD FEET) 











Cutting 



Fire 



Other ' 



Total 



State and unit 



Pon- 

 derosa 

 pine 



Other 

 species 



Total 



Pon- 



derosa 

 pine 



Other 

 species 



Total 



Pon- 



derosa 

 pine 2 



Other 

 species 3 



Total 



Pon- 



derosa 

 pine 



Other 

 species 



Total 



Eastern Washington: 



Chelan-Colville 



125.8 



97.1 

 13.1 



35.2 



48.6 

 7.7 



161.0 

 145.7 



20.8 



14.7 

 .9 

 .1 



34.6 

 5.1 



49.3 



6.0 



.1 



54.2 



85.5 

 2.4 



83.1 



87.2 



4.9 



137.3 



172.7 



7.3 



194.7 



183.5 



15.6 



152.9 

 140.9 

 12.6 



347.6 





324.4 





28.2 







Total 



236.0 



91.5 



327.5 



15.7 



39.7 



55.4 



142.1 



175.2 



317.3 



393.8 



306.4 



700.2 







Eastern Oregon: 



90.7 

 251.8 

 126.3 

 410.5 



22.5 

 4.5 

 6.7 



18.8 



113.2 

 256.3 

 133.0 

 429.3 



.5 

 9.2 

 5.8 

 10.3 



.3 

 1.7 



.8 

 2.7 



.8 

 10.9 

 6.6 

 13.0 



41.0 

 188.7 

 203.8 

 322.4 



43.8 

 40.6 

 32.8 

 49.6 



84.8 

 229.3 

 236.6 

 372.0 



132.2 

 449.7 

 335.9 



743.2 



66.6 

 46.8 

 40.3 

 71.1 



198.8 





496.5 





376.2 



Klamath Plateau 



814.3 







Total 



879.3 



52.5 



931.8 



25.8 



5.5 



31.3 



755.9 



.166. 8 



922.7 



1,661.0 



224.8 



1, 885. 8 









1,115.3 



144.0 



1, 259. 3 



41.5 



45.2 



86.7 



898.0 



342.0 



1, 240. 



2, 054. 8 



531.2 



2, 586. 











ALL STANDS * (IN MILLION CUBIC FEET) 













Eastern Washington: 



Chelan-Colville _ 



22.5 

 17.3 

 2.3 



7.1 

 9.3 

 1.7 



29.6 



26.6 



4.0 



3.0 

 .2 



22.9 

 1.7 



25.9 

 1.9 



10.2 



15.9 



.5 



24.3 



20.5 



1.7 



34.5 



36.4 



2.2 



35.7 



33.4 



2.8 



54.3 



31.5 



3.4 



90.0 





64.9 





6 2 













Total 



42.1 



18.1 



60.2 



3.2 



24.6 



27.8 



26.6 



46.5 



73.1 



71.9 



89.2 



161.1 







Eastern Oregon: 



North Blue Mountain 



16.2 

 45.0 

 22.5 

 73.3 



4.5 

 1.5 

 1.9 

 3.6 



20.7 

 46.5 

 24.4 

 76.9 



.2 



1.7 

 1.1 

 2.0 



.2 



.7 

 .3 

 .9 



.4 

 2.4 

 1.4 

 2.9 



7.8 

 34.6 

 37.4 

 59.0 



15.1 

 11.4 

 9.0 

 15.6 



22.9 

 46.0 

 46.4 

 74.6 



24.2 

 81.3 

 61.0 

 134.3 



19.8 

 13.6 

 11.2 

 20.1 



44.0 





94 9 





72 2 





154.4 







Total — . - 



157. 



11.5 



168.5 



5.0 



2.1 



7.1 



138.8 



51.1 



189.9 



300.8 



64.7 



365.5 









199.1 



29.6 



228.7 



8.2 



26.7 



34.9 



165.4 



97.6 



263.0 



372.7 



153.9 



526 6 







1 Includes insects, disease, and wind throw. 



J Insect loss in ponderosa pine based on records covering period 1931 to 1937, by Bureau of Entomology and Plant Quarantine. Losses from other 

 causes based on estimates. 



3 Losses from all causes based on estimates. 

 * Trees 5.1 inches d. b. h. and larger. 



types. Ponderosa pine stands occupied about two- 

 fifths of the area of saw-timber types deforested. 



Volume of saw timber killed annually on these 

 lands averaged 47 million board feet, of which 7 

 million board feet was salvaged. Volume lost per 

 acre of saw-timber area burned over was 1.24 M 

 board feet, whereas on national-forest land the cor- 

 responding loss was 2.76 M board feet. Sixty per- 

 cent of the volume killed on other lands, however, 

 was ponderosa pine. Practically all of the volume 

 salvaged was also ponderosa pine. 



Summary of Depletion 



The average annual loss of ponderosa pine caused 

 by the other two considerable depletion agencies, 

 disease, and wind throw, is much more difficult to 

 calculate. Some of the loss attributed to the west- 

 ern pine beetle is the indirect result of disease, 

 which has so weakened the vitality of the trees that 

 they are highly susceptible to beetle attack. Also, 

 the estimates obtained in the beetle-loss surveys are 

 of gross volume and usually include 5 to 1 5 percent 



40 



