APPENDIX BASIC STATISTICS 



621 



Table 77. — Productivity of recently cut commercial forest land in the United States and Coastal Alaska, by region, forest type 

 group, ownership class, and elements of the combined productivity class, 1953 ' — Continued 



ALL REGIONS— Continued 



Forest type group and 

 ownership class 



Medium and large private 

 ownerships (5,000 acres 

 and larger) : < 



Eastern type groups: 



White-red-jacli pine 



Spruce-fir 



Longleaf-slash pine 



Loblolly-shortleaf pine, . 



Oak-pine 



Oali-h ickory 



Oak-guiii-cy press 



Elm-asli-coltonwood 



Maple-tn'1'ch-birch 



Aspen-bircli 



Western type groups: 



Douglas-fir 



Ilemlock-Sitka spruce.. 



Redwood 



Ponderosa pine 



Western white pine 



Lodgepole pine 



Larch 



Fir-spruce 



Public ownerships: 



Eastern type groups: 



White-red-jack pine 



Spruce-fir 



Longleaf-slash pine 



Loblolly-shortleaf pine. . 



Oak-] line 



Oak-ii ickory 



Oak-gum -cypress 



Elm-ash-cottonwood 



Maple-bcech-birch 



Aspen-birch 



Western type groups: 



Douglas-fir 



1 lemlock-Sitka spruce. . 



Kcilwdod 



Ponderosa pine 



Western white pine 



Lodgepole pine 



Larch 



Fir-spruce 



Hardwoods 



Operating 

 area 



Thousand 



acres 



568 



8,160 



12, 070 



11,094 



1,416 



4,950 



5,604 



17 



5,828 



716 



5,395 

 1,750 

 716 

 4,310 

 4C9 

 358 

 677 



2,705 

 4,319 

 2,713 

 3,734 

 1,610 

 7,535 

 472 

 228 

 4,725 

 6,646 



14,023 



5,433 



66 



21, 737 



1,842 



8,278 



2, 709 



6,605 



377 



Productivity 



By combined produc- 

 tivity class 



Upper 



Per- 

 cent 

 79 

 73 

 75 

 81 

 68 

 59 

 55 

 100 

 71 

 95 



83 

 95 

 90 

 72 

 31 

 96 

 34 



90 

 100 

 79 

 16 

 90 

 42 

 72 

 77 



Medi- 

 um 



Per- 

 cent 

 17 

 26 

 13 

 14 

 21 

 33 

 36 



Lower 



Per- 

 cent 

 4 

 1 

 12 

 5 

 11 

 8 

 9 



(') 



w 



(3) 



By existing stocking, all 

 species 



Upper 



Per- 

 cent 

 58 

 81 

 29 

 58 

 61 

 35 

 36 

 94 

 67 

 73 



46 

 91 

 58 

 ?8 

 17 

 42 

 84 

 67 



Medi- 

 um 



Per- 

 cent 

 28 

 17 

 47 

 36 

 28 

 52 

 34 

 6 

 29 

 22 



42 

 5 

 26 

 55 

 63 

 53 

 15 

 21 



Lower 



Per- 

 cent 

 14 

 2 

 24 

 6 

 11 

 13 

 30 



55 



16 



42 



9 



72 







24 



« 



24 



5 



39 



5 



.53 



28 



71 



23 



8 



1 



44 



1 



57 



6 



14 



3 





79 



60 







46 



49 



61 



14 



87 



1 



55 



14 



63 





By existing stocking 

 plus prospective 

 stocking, all species 2 



Upper 



Per- 

 cent 



76 

 85 

 76 

 77 

 63 

 100 

 91 

 95 



85 

 95 

 90 

 75 

 32 

 90 

 93 



66 

 96 

 90 



80 

 90 

 100 

 81 



17 

 92 



48 

 74 



77 



Medi- 

 um 



Per- 

 cent 

 9 

 12 

 14 

 12 

 16 

 19 

 31 



Lower 



Per- 

 cent 



(?) 



(') 



0) 



17 



15 



23 



U 



4 





10 





18 



2 



10 





(') 



Existing and prospec- 

 tive stocking modi- 

 fied by composition 



Upper 



Per- 

 cent 

 80 

 88 

 75 

 84 

 75 

 65 

 56 

 100 

 79 

 95 



84 

 95 

 90 

 72 

 31 

 96 

 34 

 88 



80 

 93 

 95 

 91 



86 

 64 

 42 

 94 

 85 



79 

 90 

 100 

 79 

 16 

 90 

 42 

 72 

 77 



Medi- 

 um 



Per- 

 cent 

 16 

 12 

 15 

 11 

 16 

 29 

 33 



Lower 



Per- 

 cent 

 4 



10 

 5 

 9 

 6 



11 



m 



m 



(3) 



Proportion 

 of total 

 on which 

 felling age 

 factors 

 were ap- 

 plied 



Percent 



42 

 75 

 14 

 21 

 28 

 54 

 27 



11 

 30 



3 

 40 



15 

 27 



5 

 10 



1 

 14 

 10 



31 

 13 



' The determination of size class of private ownership was based on the 

 total commercial forest land area in the ownership. The operating area of 

 an individual ownership is the combined area of the forest types, within the 

 ownership, in which some cutting was done since January 1, 1947. The 

 operating area of any size class or type of ownership is the sum of the operat- 

 ing areas on individual ownerships in that size class or type of ownership. 

 Productivity is expressed as a percentage of the operating area oimd to be 

 in a high, medium, or low productivity class according to measurement of 

 the four elements taken into account in arriving at a combined productivity 

 index. 



2 For eastern type groups, prospective stocking estimated for desirable 

 species only. 



3 Less than 0.6 percent. 



•< Excludes operating area on some large private ownerships on which access 

 was denied. 



' Includes ownerships containing 3 to 5,000 acres of commercial forest land 

 in the East and 10 to 5,000 acres in the West. 



