Treesearch

Whole plant lethal points of foliage moisture content (FMC) for ponderosa pine, sugar pine, Douglas-fir, grand fir, and incense-cedar were established from foliage tissue of various ages. Exact lethal level depended upon the age of the tissue, but there was a general plateau between the ages 6 and 13 months for sugar pine and Douglas-fir and 3 and 13 months for incense-cedar. Whole plant relative turgidity (RT) lethal points were set for the pines and firs using 13-month-old needles. Dry-weight loss upon soaking the needles was found to increase with the severity of the drought, especially...

Recent emphasis on the measurement of upper stem tree diameters with optical dendrometers has directed attention to procedures for converting these outside-bark diameters to inside-bark diameters. One procedure that has been used requires an assumption that the ratio of diameter inside bark to diameter outside bark (henceforth called bark factor) remains the same up the stem. If this is true, bark factor measured at some reachable point on the lower stem (e.g., 4.5 feet) could be applied to diameter outside bark at any point on the upper stem to estimate diameter inside bark at that point.

The statistics on hardwood timber volume and type area presented here are being made available in response to the increasing interest in this resource in western Oregon and western Washington. These estimates are based on data obtained by the U.S. Forest Service in the course of timber inventories carried out by National Forest Administration on National Forest lands and by the nationwide Forest Survey on the remaining public and private lands.

This publication summarizes the results of the latest reinventory of four counties centrally located in western Oregon: Benton, Lane, Lincoln, and Linn. This block of four counties is one of 10 such blocks set up in the States of Oregon and Washington by the Forest Survey to facilitate orderly reinventories of the timber resources. Each block will be reinventoried at 10-year intervals and the results published in a single report for the block, The five blocks in Oregon are northwest Oregon, west-central Oregon, southwest Oregon, central Oregon, and eastern Oregon.

Listing of the numbered series lists and anonymous miscellaneous publications published by the Pacific Northwest Research Station through 1964.

The 1964 timber harvest was 6.2 billion board feet—an increase of 15 percent over 1963 (table 1). Total timber harvest for both western Washington and the State reached the highest level since 1929. A new all-time high in production was also recorded for eastern Washington—1 billion board feet.

The production of logs in Oregon in 1964 was 9.4 billion board feet, or nearly 9 percent above 1963. This year, 1964, had the third highest level of log production in history, exceeded only in 1955 and in 1952. The proportion of total cut from private lands fell to 43 percent, even though the total private cut increased 6 percent over that in 1963. Forest industry, accounting for 85 percent of the private production, had the greatest absolute increase, 291 million board feet.

Outdoor experiences can become safer and more interesting if you know how to use a map and compass. This information can help you become more familiar with the map and compass.

The 10 counties in northwest Oregon have a combined land area of 5.6 million acres, or about 8,760 square miles. These include Clatsop, Columbia, Tillamook, Washington, Multnomah, Hood River, Yamhill, Clackamas, Polk, and Marion Counties. Of this total, 4.0 million acres are commercial forest land and 1.6 million acres are nonforest land. In 1959, 1.7 million acres in northwest Oregon were in farms (U. S. Bureau of the Census 1961) This total included 960,000 acres of cropland, of which 691,000 acres were harvested; the remainder was either in pasture or fallow. Woodland on farms totaled...

This publication summarizes the results of the third reinventory of six counties in southwest Washington: Clark, Cowlitz, Lewis, Pacific, Skamania, and Wahkiakurn. This block of 6 counties is one of 10 such blocks set up in the States of Oregon and Washington by the Forest Survey to facilitate orderly reinventories of the timber resources. Each block will be reinventoried at 10-year intervals and the results published in a single report for the block. The five blocks in Washington are southwest Washington, Olympic, Puget Sound, central Washington, and eastern Washington.