CONTENTS 



Page 

 No. 



Forest survey in North Idaho . 1 



Findings in brief 2 



Comparison of resurvey with initial survey 7 



Tables 



1. Estimated differences in area statistics by major land and 



stand-size class. North Idaho . . . . 9 



2. Estimated differences in volume statistics on commercial 



forest land. North Idaho ........... 10 



3. Land area by major classes of land, North Idaho, 1951 . . . . . 11 



4. Land area by county and major classes of land, North Idaho, 1951 12 



5. Land area by ownership and major classes of land, North Idaho, 1951 13 



6. Commercial forest land area, by ownership and stand-size 



classes, North Idaho, 1951 ...... 14 



7. Area of commercial forest land by major forest types 3 North 



Idaho, 1951 15 



8. Net volume of live sawtimber. and growing stock on commercial 



forest land, by stand-size class, North Idaho, 1951 16 



9. Net volume of live sawtimber and growing stock on commercial 



forest land, by ownership class, North Idaho, 1951 ..... 16 



10. Net volume of live sawtimber and growing stock on commercial 



forest land by species, North Idaho, 1951 .......... 17 



11. Net volume of live saxrt-imber on commercial forest land by diam- 



eter class groups and species, North Idaho, 1951 ....... 18 



12. Net volume of all timber on commercial forest land, by class 



of material and species group, North Idaho, 1951 19 



13. Live timber volume on commercial forest land by county, 



North Idaho, 1951 ...................... 20 



14. Net annual growth, annual mortality, and commodity drain on 



live sawtimber and growing stock on commercial forest 



land, by species group, North Idaho, 1951 . 21 



15. Total average output of timber products and commodity drain 



on live sawtimber and growing stock. North Idaho, 1951 .... 22 



16. Annual sawlog production, North Idaho, 1925-1950 ....... 23 



17. Annual lumber production reported in North Idaho by species, 



for specified years, 1869-1950 24 



18. Annual pulpwood production- — sawlogs, North Idaho, 1935-1950 . . 25 



19. Annual pole production, North Idaho, 1946-1951 ......... 25 



20. Per-acre volume of live sawtimber on commercial forest land 



by stand-size class, North Idaho,, 1951 26 



21. Per-acre volume of growing stock on commercial forest land by 



stand- and tree-size classes, North Idaho, 1951 26 



Forest survey method 27 



Accuracy of estimates 29 



Definitions 32 



List of forest survey reports for North Idaho 37 



