468 



TIMBER RESOURCES FOR AMERICA'S FUTURE 



sawtimber cut per cord of pulpwood output. In 

 terms of growing stock the calculation is as follows: 



Volu me 

 (million 

 cu. ft.) 



Total United States output (21.4 million cords) 1, 659 



Less: Plant residues used for pulpwood 109 



Output of pulpwood logs and bolts 1, 550 



Less: Output from — 



Dead trees 26 



Cull trees ' 107 



Trees on noncommercial and on nonforest 

 land 10 



All non-growing-stock sources 143 



Output from growing stock 1, 407 



Plus: Logging residues from pulpwood cuttings _ 53 



Timber cut for pulpwood from growing stock 1, 460 



1 Also includes tops and limbs and trees of commercial 

 species under 5.0 inches in diameter. 



This illustration shows that the 1952 output of 

 21.4 milUon cords of softwood pulpwood required 

 a cut of 1,460 million cubic feet of growing stock, 

 or 68 cubic feet per cord. In terms of board-foot 

 voliune from sawtimber trees, the cut amoimted 

 to 4,252 million board-feet or 198 board-feet per 

 cord of softwood pulpwood output. Similar 

 utilization factors have been derived for hardwood 

 pulpwood, and for the cut of softwood and hard- 

 wood associated with output of the various other 

 timber products.'" 



Fuller Utilization Anticipated 



Anticipated changes in relationsliip of product 

 output to timber cut, between 1952 and 1975, are 

 estimated for each product in each region, by soft- 

 woods and hardwoods, and the 1952 utihzation 

 factors are modified accordingly. Utilization 

 factors for 2000 are derived by projecting the 

 1952-75 trends, modifying them as the outlook for 

 utihzation conditions in individual regions or for 

 particular products may suggest. Although based 

 initially on past experience, future utilization 

 factors are, of course, a matter of judgment. 



To continue the softwood pulpwood illustration, 

 comparison of the annual cut of growing stock and 

 of live sawtimber — per cord of domestic pulpwood 

 output required by the medium projected demand 

 for pulpwood in 1975 and 2000 — indicates how the 

 utilization factors were projected: 



Growing Live 



stocli sati'limber 



(cu. ft. (bd.-ft. 



Year : P^^ cord) per cord) 



1952 68 198 



1975 57 151 



2000 53 149 



'*' See appendix section on converting factors. 



Fuller Utilization Means Savings of 

 Timber 



Comparing the cut required to meet future 

 projected demand under anticipated changes in 

 utilization practices with the cut required to meet 

 the same demand under 1952 utilization practices, 

 it is apparent that sizable "savings" are imphed. 

 Thus, future sawtunber savings due to fuller utili- 

 zation of timber cut to meet the medium projected 

 demands for softwood pulpwood are expected to 

 be about 23.7 percent by 1975 and 24.4 percent 

 by 2000: 



Medium projected demand for softwood ^^'''S iooo 



pulpwood (million cords) 40 60 



Cut of live sawtimber per cord: 



1952 factor (bd.-ft.) 198 198 



Anticipated factor (bd.-ft.) 151 149 



Cut of live sawtimber based on: 



1952 factor (million bd.-ft.) 7,920 11,880 



Anticipated factor (million bd.-ft.) 6,040 8,980 



Savings (million bd.-ft.) 1, 880 2, 900 



For the country as a whole, and for all species, 

 the savings anticipated from fuller utilization of 

 the cuts of live sawtimber required to meet 

 medium projected demands for various products 

 in 1975 and 2000 work out to 4.8 and 5.1 percent. 



1952-75 195B-S000 

 (percent) (percent) 



Saw logs 1.7 1.8 



Pulpwood 18.6 20.0 



Veneer logs and bolts 1.9 2.0 



Fuelwood 10.3 23.7 



Other products 9. 7 9. 7 



All products 4.8 5.1 



Applying these percentage savings for live saw- 

 timber, and similarly estimated savings for grow- 

 ing stock, the total savings in the timber cuts 

 required to meet the three projected demands for 

 all products in 1975 and 2000 are as follows: 



Live saw- Growing 



timber stock 



(billion (billion 



Lower projected demand: bd.-ft.) cu.ft.) 



1975 2.8 LO 



2000 4.3 L3 



Medium projected demand: 



1975 3.3 1.5 



2000 5.1 2.7 



Upper projected demand: 



2000 6.2 3.3 



Timber Cut Estimates Derived From 

 Estimates of Timber Products Out- 

 put in 1975 and 2000 



Beginning with the domestic output of each 

 timber product, deducting that part of the out- 

 put obtained from plant residues and from non- 

 growing-stock sources, adding the volume of 



.y. 



