Treesearch

Conifer seeds were sown in clearcut Abies amabilis/Achlys triphylla and Abies amabilis/Vaccinium membranaceum/Xerophyllum tenax habitat types in the McKenzie River basin in Oregon to determine ratios of seeds to established seedlings. Protection from animal predation and shade from stumps were beneficial, but survival and growth did not differ significantly between habitat types or among humus treatments. Germination in the greenhouse was earlier and more prolonged on soils from the Achlys type.

Employment and earnings in Kentucky's forest products industry, like those of most Southern States, grew significantly between 1970 and 1980. In fact, Kentucky's share of the Nation's forest products employment and earnings increased during this period. In 1980, lumber and wood products accounted for the largest share of the industry's employment, but paper and allied products had more earnings. Furthermore, in 1977, pulp and allied products had higher productivity than either lumber and wood products, or wood furniture.

Until the 1970's, the Pacific Northwest dominated national markets for softwood lumber and plywood. During the 1970's, however, the region's share declined while production increased in the South. Meanwhile, the South's and the Pacific Northwest's shares of the Nation's employment in lumber and wood products declined. This resulted mainly from the increase in lumber imports from Canada and the construction of new, state-of-the-art plywood mills in the South. Trends in Canada and the South suggest that the Pacific Northwest could regain its dominant position as the supplier of solid...

Six studies were used to compare differences in recovery of volume and value among live, recent dead, and older dead lodgepole pine (Pinus contorts Dougl. ex Loud.) in the Western United States. The products studied included boards, random-length dimension, studs, and veneer. For the average size log (12 cubic feet) absolute values were highest for boards, followed by dimension, veneer, and studs for both live and dead timber. The percentage change in value from live to dead, however, showed the reverse order; studs lost the least value and boards the most.

Employment and earnings in South Carolina's forest products industry, like those of most Southern States, grew significantly between 1970 and 1980. The forest products industry accounted for a larger share of the State's economic base in 1980 than in 1970. Moreover, during this period, the State increased its share of the Nation's forest products industry employment and earnings. Pulp and allied products had the highest productivity, but lumber and wood products experienced the largest increase in productivity between 1972 and 1977.

This paper examines five "timber-dependent" counties in the Pacific Northwest to document: (1) net migration rates of older (and presumably retired) people into these counties, and (2) changes in the economic base of each county during the 1970's. We identify a "retirement" sector and argue that it has become a major economic sector in three of our study counties. This development has at least two implications for natural resource management in such counties. First, economic diversification may lessen the effects of projected declines in timber harvests. Second, local concern for the...

Duff consumption by fire was studied on 15 cable-yarded clearcut units in western Oregon and western Washington. Equations are presented that predict duff consumption (in depth reduction and weight loss) from loading, consumption, and moisture of large fuels, and days since significant precipitation. When more than 25 days elapsed since 1.3 cm rainfall, the effect of large fuel loading on duff consumption diminished. Duff consumption was dependent on the diameter reduction of large fuels when there had been no rain for at least 25 days. The results indicated that duff consumption can be...

Growth, stand development, and yield were studied for young, thinned western hemlock (Tsuga heterophylla Raf. [Sarg.]). Two similar studies were located at Cascade Head Experimental Forest in the Siuslaw National Forest, western Oregon, and near Clallam Bay on the Olympic Peninsula in Washington. At the latter, first thinnings were made at two ages; one at about the time of initial crown closure (early or crown closure thinning), and the other after competition was well underway (late or competition thinning). Stands, age 7 at breast height at time of crown closure thinning, were grown for...

Radial-growth recovery related to amount of tree defoliation was measured 10 years after a severe outbreak of Douglas-fir tussock moth (Orgyia pseudotsugata (McDunnough). For the period 1978-82, growth of qrand fir surpassed and was significantly greater than in the preoutbreak period, 1968-72. Douglas-fir growth during the postoutbreak period showed similar patterns, but it was not significantly different from preoutbreak growth for every defoliation class. Growth of undefoliated trees was also greater during the postoutbreak period, indicating that above-normal precipitation aided tree...

This publication lists all completed and current research projects in research natural areas in Oregon and Washington and in those few research natural areas in Idaho that are administered by National Forests in Oregon. The list includes project title, status, source of funding, and principal investigator and address. A list of publications pertaining to research natural areas is also included. Where possible, publications and research projects are correlated. The publication outlines the scientific use and importance of research natural areas as research sites for applied and basic...