Treesearch

This report presents the findings of a study conducted to determine change in per acre timber volume on non-Federal timberlands in Washington from the mid-1960’s to 1978-80. The basis for the-study was the measurement of 1,576 permanent plots at two occasions. The study findings include estimates of change in volume and of the components of change-growth, mortality, and timber cut. Timber volume increased during the period in eastern Washington but was apparently stable in western Washington. The findings differ, however, among owners and geographic areas. Tables of volume change, growth,...

The aim of this paper is to summarize current knowledge of effects of initial spacing and respacing of plantations and natural stands on early growth until the time of first commercial entry—for coastal Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco), concentrating on conclusions that can be drawn from the literature and the authors' own studies.General results of initially close spacings, with or without subsequent thinning, are well known (Evert 1971, 1973, 1984, Hamilton and Christie 1974, Sjolte Jorgensen 1967), and interest in spacing is increasing. The high costs of stand...

Norway spruce cuttings of 40 clones were tested on seven contrasting sites in northern Germany. Analysis of variance for ten-year height growth indicate a highly significant clone x site interaction. This interaction may be reduced by selection of stable clones. Several measures of stability were calculated and discussed. Characterization of sites by the method of genetic correlation indicate that most of the interaction is being generated between sites of high and low elevation. Stratification of the area into two planting zones based on elevation would also reduce the interaction....

Employment and earnings in Alabama'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. Of the 13 Southern States, only 5 had more forest products industry employment than Alabama. Moreover, during this period, the State increased its share of the Nation's forest products industry employment and earnings. Paper and allied products had the highest productivity and experienced the largest increase in productivity between 1972 and 1977.

This guide presents the plant association classification for the western hemlock zone of the Gifford Pinchot National Forest. The bulk of the forest below about 3000 feet in elevation is included in this zone, comprising about one half of the entire landbase. Much of this area is blanketed with productive stands of Douglas-fir.

This bibliography provides extensive coverage of a relatively new field of study. Entries relate to models, techniques, and information regarding spatial and regional analysis printed before 1981.

This report summarizes a 1986 timber resource inventory of the non-Federal forest land in the 10 counties (Clackamas, Clatsop, Columbia, Hood River, Marion, Multnomah , Polk, Tillamook, Washington, and Yamhill) in northwest Oregon. Detailed tables of forest area, timber volume, growth, mortality, and harvest are presented.

This report is one of five that provide timber resource statistics for 57 of the 58 counties in California (San Francisco is excluded). This report presents statistics from a 1981-84 inventory of the timber resources of Butte, Colusa, El Dorado, Glenn, Lake, Napa, Nevada, Placer, Plumas, Sacramento, Sierra, Sutter, Tehama, Yolo, and Yuba Counties. Tables presented are of forest area and of timber volume, growth, and mortality. Timberland area is an estimated 4 million acres, which is 33 percent of the Sacramento resource area. Growing stock volume is 15 billion cubic feet. The three most...

The 6th international workshop on forest regeneration at high latitudes took place during a period of transition for the forest industry worldwide. The economic slump in the forest products industry had bottomed-out; the planting approach to forest regeneration was being questioned, primarily, but not solely for economic reasons; the future of the workshops on forest regeneration at high latitudes was being examined; and changes were in progress within the School of Agriculture and Land Resources Management at the University of Alaska-Fairbanks. The economic slump in the forest industry...

This report summarizes a 1983 multiresource forest inventory of the island of Molokai, Hawaii. Tables of forest area, timber volume, vegetation type, ownership, land class, and wildlife are presented.