Special Held studies and analvses ot tire reports were 

 made to determine the rate ot loss by fire and insects, 

 h.stimates ot the drain irom timber cutting were prepared 

 with the aid ot annual and biennial timber-product census 

 figures supplemented with special studies. A special 

 canvass ot wood consumption cave the basis tor estimating 

 timber-product needs. 



Written during peacetime, this publication in general 

 portrays the situation prior to I'M I. Statements re- 

 garding current conditions must be interpreted accord- 

 ingly. 



RxfylcniiJtion of lernis Used 



Comnieriiiil tDid Soyicommercuil Lands 



Commercial torest is defined as lami capable ol producing commercial 

 timber and economically accessible, now or prospectively, and not 

 reserved from cutting. Noncommercial torest includes (1) land capable 

 of producing commercial timber and economically accessible, now or 

 prospectively, but withdrawn from timber use, and (2) land chiefly valu- 

 able tor purposes other than timber production; namely, subalpine an<l 

 other forest land which, because ot low productivity or extreme inacessi- 

 bility, appears to be permanently out of the commercial timber-producing 

 class. 



Forest Types 



Stocked Co.mmf.rciai. I'orf.st Land 



Stocked commercial forest land comprises areas with at least .' or 4 M 

 board feet of saw timber per acre, or more than 1(1 percent stockeii with 

 poles, seedlings, or saplings. Such stands are ijroupcd into 10 forest 

 types as tollows: 



H'esleni while /XHt.- Stands containing 15 percent or more by volume 

 of western white pine. This type is given priority over all others. The 

 mininuim volume tor a saw-timber stand is 4 M board feet per acre. 



I'imilerosa pine. — Stands containing 25 percent or more of ponderosa 

 pine. This type ranks next in priority to western white pine. The 

 minimum volume for a saw-timber stand is .' M board feet per acre. 



/.riir/t-Doug/as-Fir. — Stands containing 10 percent or more of western 

 larch and 75 percent or more of larch and Douglas-fir combined. I'he 

 nummum volume for a saw-timber stand is 4 M board feet per acre. 



Hemlod-gitDiii fir. — Stands containing >^^ percent or more of western 

 hemlock or grand fir, or both. The mininnmi \olunu' tor a saw timber 

 stand IS 4 M board feet per acre. 



Dunj^lti5-fir.- Stands containing ('0 percent or more ol Douijlas-fir 

 and less than 10 percent ot larch. The mininuim volume for a saw- 

 timber stand is 4 M board feet per acre. 



t.ii^elniaiiii ipiuee.- -Stands containing 5<' percent or more of Kngel- 

 mann spruce. I he mininnmi volume tor a sa»-timbcr stand is 4 M 

 board I'eet per acre. 



/.m/f(/>o/c /)i«f.- - Stands coniamiiii; 5o percent or more ot lodge 

 pole pine. 1 he minimum \<iliinu' lor a saw (iinber stanil is ."> M board 

 feet per acre. 



H'esleni redieiiar.- -Stands in which western rcdcedar prciloniinatcs. 

 The minimum volume for a saw timber stand is 4 M board feet }Kr acre 

 or 8 cedar poles per acre. 



CeJar- grand fir. Stands in which weslcrn rcdcedar and grand (ir 

 predominate. The mininuun volume lor a saw-timber stand is 4 M 

 board feet per acre or 8 cedar (Hiles per acre. 



CiillonwooH. Stands in which northern black cottonwood predomi- 

 nates. There is no minimum volume for a saw-timber stand; the ma- 

 jority ot the dominant trees must be of saw-timber size. 



NO.V'STOCKED COMMERCIAL FOREST LA.SD 



Snnreslucked cut-over. — Unimproved, logged areas which at the date 

 of mapping averaged less than y or 4 M board feet per acre, and were 

 less than 10 percent stocked with poles and/or seedlings and sapLngs. 



Nonrestocked burn. — L;nimpro\ed lands deforested by lire and not 

 restocked at time of mapping. 



Size Classes 



Saw-liml/er slands. — Stands with a minimum of .3 or 4 .\I board feet 

 (depending upon forest type) of saw-timber volume per acre. Western 

 white pine, ponderosa pine, lodgepole pine, western rcdcedar, and 

 cottonwood trees 1 1 inches d. b. h. and larger are classed as saw timber. 

 For the other species, trees 13 inches and larger are classed as saw timber. 



Pole stands. — Stands in which most of the dominant trees are from 5 

 inches d. b. h. to saw-timber size. 



Seedling and sapling stand.'. — Stands in which most of the dominant 

 trees are under 5 inches in diameter. 



Ownership Classes 



Large private.— Th\s class includes for the most part the forest holdings 

 of those individuals and concerns owning more than l.tXJO acres of forest 

 land. 



Small private. — This class includes for the most part the forest holdings 

 of those individuals and concerns owning less than l.fHK) acres of forest 

 land. 



Slate. — The torest holdings of the State of Idaho. 



C6«/;/v. -The forest holdings of the 10 counties. 



Indian reservation. — The forest area held in trust for the Indians. 



Public domain. — Federal forest area unreserved tor any special purpose. 



National forest. — Federal forest area managed b\ the Forest Service 

 of the Department of .Agriculture. 



H'aler-power reservation. — Public domain or national-forest land on 

 which the water-power rights have been reserved. 



Common atul Scientific Names of Species 



1 KKK> 



C"tnwi«<nHi, Tuirtliern black 



Douglas-fir 



Fir, ;t1pine 



Fir, grand 



Hemlock, mountain 



Hemlock, western 



I, arch, western . 



Pine, ioilge|x>le 



Pine, ponderosa 



Pine, western white i Idaho white pine 



Pine, whitcbark . . 



Rcdcedar, western 



Spruce, Fngclniann 



Popuius tricincarpij fJiltlMu 



Pseudotsuga Imxifalia 

 . iiies lasioiarpa 

 . /. granJis 

 Tsuga meriensitina 

 T. hetrrophslla 

 luirii o((idtnHdis 

 Pinus conlorUt 

 P. pondtros* 

 P. mantiiola 

 P. albi,*ulis 

 ThMim pti<»t» 

 Pie f II tHgflm^nHii 



Wll.n CI KK\NIS AND tlOOSERBRKIKS 



Currant, Coloravli^ 

 Currant, maple Icat 

 Currant, prickly 



Currant, slickv . 



Currant, western or wild black. 

 Currant, wild ret! 

 tiixv-eberry, inland black 

 Gvxvsebcrrv, white steniinevi 



K .1, c' I'lum^ft 

 R. Imrtutrt 

 R. Tiu-ojiuimitm 

 R. prlio/sre 

 R. trisle 

 R. irrigumm 

 R. intrmt 



