Treesearch

Forest residues often require treatment to meet land management objectives. Guideline statements for managing forest residues are presented to provide direction for achieving these objectives. The latest research information and the best knowledge of experts in various land management disciplines were used to formulate these statements. A unique keying system is provided for determining which guidelines apply to a particular management activity, for a given site in a given location, and within a given forest species association type.

In 1972, forest industries in Okanogan County, Washington, accounted for 23 percent of total employment and 29 percent of wages paid. Total forest industrial employment has increased since 1953 but represents a smaller proportion of total employment in the county due to the increase in other industries, mainly construction and trade. Timber harvest has nearly doubled since 1953, from 116 million board feet (Scribner scale) to 198 million. In 1972, 90 percent of the timber harvest was from public lands compared with 76 percent in 1953. Timber supplies are projected to decline slightly-about...

The latest inventory of the timber resources of the Blue Mountain Area of Oregon indicates that there are about 47 billion board feet of sawtimber on 4.6 million acres of commercial forest land. Public agencies administer about 76 percent of the area and hold 89 percent of the sawtimber volume; farmer and miscellaneous private ownerships account for 16 percent of the area but only 6 percent of the sawtimber volume; and forest industries 8 percent of the commercial forest area and 5 percent of the volume. Total volume of timber and area of commercial forest land have declined about 10...

Southeast Alaska has 11.2 million acres of forest land, of which 4.9 million acres are considered commercial. This commercial acreage supports 166 billion board feet of sawtimber. These primarily old-growth stands of Sitka spruce and western hemlock are supporting a growing wood products industry that ranks first in the southeast economy and third in the State. This report summarizes current knowledge of the timber resource (areas, volumes, growth, mortality, quality, productivity, and trends) from the initial inventory, a partial remeasurement, and a second inventory now in progress....

After a brief description of silvicultural problems, the author tells how to prescribe herbicidal sprays for aerial, application in Pacific Northwest forests. The publication offers a detailed discussion of the five basic considerations: (1) selection of the best herbicide or herbicides, (2) amount of herbicide to be applied per acre, (3) carriers, (4) volume of spray per acre, and (5) seasons for application of aerial sprays. Appendixes provide standard treatments for many common silvicultural problems in site preparation and to release young conifers from shrub and weed tree competition....

The forest manager must balance all the interacting and often conflicting factors influencing residue management and decide on the best course of action. He needs to determine optimum volume, size, and arrangement of residues to leave on an area after logging, then to select the harvesting methods and residue management alternatives that best provide these conditions. Cramer (1974) summarized environmental effects of forest residues management for major forest types in the Pacific Northwest, but types of treatment were not listed and only minor attention was given to hemlock-spruce...

This comprehensive catalog of viral diseases of two large groups of arthropods updates the previous surveys of the world's literature published by Hughes in 1957 and by Martignoni and Langston in 1960. This computer-based catalog lists over 600 species of insects and mites, each reported to have one or more of 21 viral diseases or disease groups, for a total of over 900 host-virus records. The catalog consists of two lists. In the first one the hosts are listed in taxonomic sequence (order, family, genus, species). Species appear alphabetically within each genus, genera alphabetically...

This report for the 3-million-acre Fairbanks block is the first of four on the 14-million-acre Tanana Valley inventory unit. Observations are made on forest condition, defect, stand regeneration, fire history, and present use. Data are provided for an operable noncommercial forest land category as well as for standard Forest Survey area and volume statistics. Commercial forest land occupies three-quarters of a million acres and has a net volume of 578 million cubic feet. Growing-stock volume on 51,000 acres of operable noncommercial forest land is 49.6 million cubic feet.

This first intensive forest inventory of Alaska's Copper River Valley found a commercial forest area of 287,800 acres with 303.8 million cubic feet of growing stock. Additionally, a noncommercial stratum was examined that had substantial standing volume but did not meet the growth criteria for commercial forest land. This stratum contained 152,800 acres with a volume of 157.9 million cubic feet. Because of the distance from population centers and the general low quality of the timber, the Copper River stands probably would be marginal suppliers to the world market.

Trade and other policies are being considered by the U.S. Forest Service according to the terms of the Forest and Rangeland Renewable Resources Planning Act of 1974 (Public Law 93-378,93d Congress, S.2296). This paper describes the issues involved in the question, "Should we or should we not attempt to reduce net imports of forest products?" In terms of volume, net imports of forest products amount to about 12 percent of U.S. consumption. The value of imports exceeds the value of exports by about $1.5 billion. Most of U.S. softwood imports come from Canada and hardwoods from South Korea,...