| Logging residues | Output from nongrowing stock | |||
| Year | Softwood | Hardwood | Softwood | Hardwood |
| % of timber product removals from growing stock | % of timber supplies | |||
| 1952 | 9.8 | 22.2 | 10.4 | 20.9 |
| 1962 | 9.6 | 20.7 | 10.0 | 18.5 |
| 1970 | 10.0 | 19.7 | 7.0 | 13.9 |
| 1976 | 8.4 | 17.1 | 6.9 | 14.0 |
| 1986 | 9.0 | 13.2 | 11.5 | 38.5 |
| 1991 | 7.5 | 12.0 | 11.9 | 37.5 |
Sources: Haynes, R.W., D.M. Adams and J.R. Mills, The 1993 RPA Timber Assessment Update, Table 7, p. 16, and Table 8, p. 17 (U.S. Department of Agriculture, Forest Service, Washington, DC, 1995).
Notes: Logging residues are lower quality material, such as small stem, chunks, and low-quality stems. Declining amounts of residues reflect increased stumpage prices, improved logging technology, and increased demand for wood products. Timber supplies from nongrowing stock include salvable dead trees, rough and rotten trees, tops and limbs, defective sections of growing stock trees in urban areas, along fence rows, and on forested lands other than timberlands. Output from these sources has been greatly influenced by markets for pulpwood and fuelwood since the late 1970s.
Last Updated on