Treesearch

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 Alameda, Contra Costa, Marin, Monterey, San Benito, San Luis Obispo, San Mateo, Santa Barbara, Santa Clara, Santa Cruz, Solano, and Ventura Counties. Tables presented are of forest area and of timber volume, growth, and mortality. Total timberland area is an estimated 340,000 acres, 3 percent of the total land area. The estimated total volume of growing stock is 2 billion...

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 1982-84 inventory of the timber resources of Alpine, Amador, Calaveras, Fresno, Imperial, Inyo, Kern, Kings, Los Angeles, Madera, Mariposa, Merced, Mono, Orange, Riverside, San Bernardino, San Diego, San Joaquin, Stanislaus, Tulare, and Tuolumne Counties, California. Tables presented are of forest area and timber volume, growth, and mortality. The San Joaquin and southern California resource areas contain 56 percent...

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 Del Norte, Humboldt, Mendocino, and Sonoma Counties. Tables presented are of forest area and of timber volume, growth, and mortality. The north coast resource area contains an estimated 3.6 million acres of timberland and 13.8 billion cubic feet of standing timber. This is 22 percent of the total area of timberland in the State and 25 percent of the total volume.

Markets for small lower grade ("construction-grade"), softwood logs are projected to expand steadily through 1995. Log supplies will lag slightly behind demand until 1990, generating about a 10-percent increase in prices. Prices are expected to be level thereafter. United States exports of construction-grade logs are projected to increase 35 percent by 1990 and another 23 percent by 1995.

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.