172 



TIMBER RESOURCES FOR AMERICA'S FUTURE 



all raw materials entering the plants as logs and 

 bolts. Coarse residues alone were equivalent in 

 volume to the entire cut of growing stock for pulp- 

 wood in the United States in 1952. 



The great bulk of plant residues is attributable 

 to lumber manufacture. In 1952, about 86 per- 

 cent of the total volum^e was found in tliis industry 

 (table 106 and fig. 68). This is not at all surpris- 

 ing, for sawmills consume nearly three-quarters of 

 all logs and bolts used in primary manufactm'e 

 and nearly half the saw-log volume ends up as 

 residues. Much the same situation exists in all 

 regions, since the quantity of logs used for lumber 

 in the different regions far exceeds the volume 

 used by other industries. And largely for this 

 reason plant residues are distributed geographi- 

 cally in about the same proportion as sawtimber 

 cut. Thus 43 percent of all plant residues were 

 in the West and Coastal Alaska, 43 percent in the 

 South, and 14 percent in the North (table 107). 



Plant Residues in Relation to Input 

 Are Greatest in Cooperage Manufac- 

 ture, Least in Preparing Wood for 

 Pulping 



Although lumber manufacture is responsible for 

 most of the plant residues volume, residue volume 

 as a percent of total roundwood input is not so 

 high as for some other products (table 108). For 

 example, residues in the manufacture of cooperage, 

 because of more exacting quality specifications, 

 are generally greater in relation to the volume of 

 logs and bolts processed than for either lumber or 

 veneer. 



At pulp mills, on the other hand, relatively 

 small losses are incurred from the time the pulp- 

 wood is received until it is chipped and ready for 



final processing into pulp. Estimates place these 

 losses at about 7.5 percent of the roundwood 



Table 107. — Plant residues in the United States 

 and Coastal Alaska, by kind of material, and by 

 section and region, 1952 



Section and region 



Total 



Coarse 



Fine 



North: 



New England 



Mil- 



lion 



cu. ft. 



126 



143 



110 



88 



4 



Per- 

 cent 



3. 7 



4. 2 

 3.2 

 2. 6 



. 1 



Mil- 

 lion 

 cu. ft. 

 68 

 79 

 61 

 54 

 2 



Mil- 

 lion 

 cu. ft. 

 58 



Middle Atlantic _ 



64 



Lake States 



49 



Central 



34 



Plains 



2 







Total 



471 



13. 8 



264 



207 



South: 



South Atlantic 



Southeast 



504 

 663 

 308 



14.8 



19. 4 



9.0 



241 

 299 

 124 



263 

 364 



West Gulf 



184 



Total - 



1,475 



43. 2 



664 



811 







West: 



Pacific Northwest: 



Douglas-fir subregion _ _ 

 Pine subregion 



842 

 130 



24. 7 

 3.8 



378 

 58 



464 

 72 



Total 



California 



972 

 372 



81 



38 



28.5 

 10. 9 



2.4 



1. 1 



436 

 242 



31 



21 



536 

 130 



Northern Rocky 



Mountain 



Southern Rocky 



Mountain 



50 

 17 



Total 



1,463 



42.9 



730 



733 



Total, United States 



Coastal Alaska . 



3,409 

 5 



99.9 

 . 1 



1,658 

 3 



1, 751 

 2 







United States and Coastal 

 Ahiska 



3, 414 



100. 



1,661 



1,753 



Table 108. — Plant residues as a proportion of total 

 United States and Coastal Alaska, 



17} 



volume of logs and bolts used in primary manufacture, 

 by type of industry and section, 1952 



Section 



Lumber ' 



Veneer 



Pulp 2 



Cooperage 



Other 3 



Total 



North _ - _ _ 



Percent 



42. 2 

 56. 1 



43. 3 



47. 9 



Percent 

 43.5 

 50. 3 



46. 



47. 2 



Percent 



10. 1 



6.4 



6.2 



7.5 



Percent 

 65. 7 

 51.9 

 10. 6 

 54. 5 



Percent 

 27.9 

 22. 

 40. 5 

 29. 4 



Percent 

 28. 5 



South 



West and Coastal Alaska 



United States and Coastal Alaska 



39. 8 

 39.4 

 37.6 



' Includes planing mills integrated with sawmills. 



2 Plant residues at pulp mills relate only to wood losses 

 in storage and in preparing the wood for pulping. Addi- 

 tional losses of wood substance in the various pulping pro- 

 cesses are excluded. 



3 Includes small dimension and turnery plants, shingle 

 mills, chemical and e.xcelsior plants, and similar establish- 

 ments utilizing roundwood. 



' 



