Treesearch

Alaska forest products trade flows for 1982 were studied to determine the effects of the Merchant Marine Act of 1920 (the Jones Act). Information was collected from timber producers, forest product industries, and waterborne shippers in Alaska, British Columbia, and the Pacific Northwest. Trade flows were simulated, using a partial equilibrium model based on resource rents, with and without the Jones Act restrictions. Results indicate that $4.77 million in additional costs were incurred in 1982 because of the Jones Act. These effects appeared small, however, relative to the wholesale value...

Systematic, long-term measurements of the survival and growth effects of releasing crop trees from competing vegetation are important for evaluating vegetation management treatments in forest plantations. This report details field-tested procedures for use in any type of release treatment—mechanical, manual, biological, or chemical. The basic concept is to delineate one untreated plot within each plantation to be monitored and to compare survival and growth on that "control" plot with survival and growth on a treated plot that is similarly delineated. Each installation should be examined...

A field guide to predict site index for red alder (Alnus rubra Bong.) was developed for use in western Washington and Oregon. The guide requires the user to evaluate 14 soil-site properties that are grouped into three general factors: (1) geographic and topographic position, (2) soil moisture and aeration during the growing season, and (3) soil fertility and physical condition. Construction of the guide was modeled after a method of site evaluation developed for several southern hardwood species. The red alder model is accurate when used properly. The correlation (r) between predicted and...

Site preparation is often necessary to obtain adequate forest regeneration, but inappropriate treatment may reduce subsequent growth. Broadcast-burned and piled-and-burned plantations were studied in southwestern Oregon to determine if burning method affected the growth of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco var. menziesii). The measured and potential heights of 5-year-old seedlings were about equal where broadcast burning occurred, but measured heights were less than potential heights on most of the piled-and-burned plantations. Site quality probably is damaged by piling and...

A floristic survey of Meeks Table Research Natural Area in the Wenatchee National Forest, Washington, documents 159 vascular plant taxa representing 39 families. This paper provides estimates of abundance by plant community or by other habitat characteristics for all taxa listed. Plant communities are described and mapped based on current vegetation.

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 Lassen, Modoc, Shasta, Siskiyou, and Trinity Counties. Tables presented are of forest area and of timber volume, growth, and mortality. Timberland area is an estimated 5.7 million acres, 40 percent of the total land area. Total growing stock volume is 16 billion cubic feet. The northern interior resource area contains 14 percent of the State’s total land area, 35 percent of...

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.