Treesearch

This history records the first large-scale bark beetle control project in a national park in the Pacific Northwest. It describes the relations between Park Service, Forest Service, and USDA Bureau of Entomology personnel; how the project was organized; the ecological implications of the outbreak; and the long-term results of direct control measures.

TRIM (Timber Resource Inventory Model) is a yield table projection system developed for timber supply projections and policy analysis. TRIM simulates timber growth, inventories, management and area changes, and removals over the projection period. Programs in the TRIM system, card-by-card descriptions of required inputs, table formats, and sample results are presented The programs are available from the Pacific Northwest Research Station.

This report summarizes a 1985-86 timber resource inventory of the non-Federal forest land in the four counties (Benton, Lane, Lincoln, and Linn) in west-central Oregon. Detailed tables of forest area, timber volume, growth, mortality, and harvest are presented.

Initial stand statistics for the levels-of-growing-stock study installations were projected by the Douglas-fir stand simulation program (DFSIM) over the available periods of observation. Estimates were compared with observed volume and basal area growth, diameter change, and mortality. Overall agreement was reasonably good, although results indicate some biases and a need for revision of the upper density limit in the DFSIM program.

Three-dimensional contour surfaces were drawn for physiologically active radiation (PAR) and air and soil temperatures from measurements taken at a high-elevation site (1450 m) near the crest of the Cascade Range in central Washington. Measurements in a clearcut were compared with measurements from an adjacent uncut stand. Data for 31 days in July and August 1985 illustrated the rapid changes as storms off the Pacific Ocean displaced the dominant high pressure of summer.

Ground plots examined between 1965 and 1975 were recoded to reflect current ownership of forest resources in southeast Alaska. Of 6.3 million acres of timberland in southeast Alaska, 5.6 million acres are federally "owned," 200,000 acres are owned by the State, 409,000 acres are owned by private corporations, and the remaining 59,000 acres are owned by various "other" owners. Figures for State and private corporation owners reflect increases, the federally "owned" amount represents a decrease, and the "other" owner figure shows essentially no change.

Rooting and shoot growth characteristics of 10-, 15-, and 20-year-old Sitka spruce cuttings were studied. Twigs from three branch orders were tested with or without 5000 parts per million indole-3-butyric acid (IBA) hormone treatment. Rooting success averaged 64 percent. The effect of ortet age on rooting success was not significant. Cuttings from first-order branch positions rooted slightly better than cuttings from second- and third-order positions. Cuttings treated with the IBA hormone had slightly poorer root induction than control cuttings for all ortet age-branch order combinations,...

Repeated growing-season frosts during late April and early May 1985 caused extensive damage to red alder (Alnus rubra Bong.) seedlings in a newly planted research trial in western Washington. About two-thirds of the seedlings were severely damaged (entire stem damaged or necrotic). Such damage varied by family, from 50 percent of seedlings in the least affected family to nearly 90 percent of seedlings in the most sensitive family. Seedlings planted in plots fertilized with triple superphosphate suffered greater damage than those in unfertilized plots.

Twelve fungus species were isolated from three shrubs—Arctostaphylos patula, Ceanothus velutinus, and Castanopsis chrysophylla—in ponderosa pine stands in central Oregon. Hormonema dematioides was most frequently isolated and was recovered from all three shrubs. Penicillium frequentans was most frequently isolated from the single shrub, Arctostaphylos patula, at all but one location. Three potential plant pathogens, Alternaria alternata, Drechslera sp., and Truncatella angustata, should be further investigated as possible biological control agents.

A sample of 58 logs was used to evaluate five methods of making scale deduc-tions for pecky rot in incense-cedar (Libocedrus decurrens Torr.) logs. Bias and ac-curacy were computed for three Scribner and two cubic scaling methods. The lumber yield of sound incense-cedar logs, as measured in a product recovery study, was used as the basis for comparison. Results showed that the most biased and least accurate scaling systems deducted the greatest percentage of log volume.