Treesearch

An extensive literature'points to wild mammals as agents that may seriously reduce the productive capacity of forests and in many ways, interfere with efforts to grow valuable trees. While the loss of forest values is not a new problem, it has been brought into sharper focus through better identification of the various kinds of mammal-caused injuries and by improved survey, techniques. These latter actions have been spurred by the high values now attached to forest products I consequent emphasis on early regeneration of timber stands.

Measurements indicate a relation between diurnal curves of relative humidity and moisture content of some important fuels of Oregon and Washington. Some of these measurements were made in early years of forest fire research in this region. The data in this note were collected at intervals throughout 4 days (in September 1938) at the Wind River Experimental Forest near Carson, Wash. The relations presented here will be of interest when the new National Fire Danger Rating System is used in the Pacific Northwest. This system bases its estimate of fine-fuel moisture content on relative...

Washington's 1962 log production reached 5.05 billion board feet. This is an increase of 14 percent, or 616 million board feet, over 1961 and the highest total log production since the 1941 figure of 5.14 billion board feet.

Only the State and Indian ownerships showed increased log production in 1961 as total log production in Washington dropped 291 million board feet, or 6.1 percent, compared with 1960.

Clear cutting is the standard harvesting system in old-growth Douglas-fir (Pseudotsuga menziesii) forests in the Pacific Northwest. Usually these clear cuts are in "staggered settings" of 15 to 80 acres with the surrounding stand left uncut to provide seed and serve as a firebreak. However, satisfactory natural regeneration of Douglas-fir does not always develop on such cuttings. The erratic and infrequent occurrence of abundant Douglas-fir seed crops and high surface soil temperatures appear to be major deterrents in many areas. Consequently, some modified clear cuts were tried in...

This publication summarizes the results of the third inventory of six northeast Washington counties: Ferry, Lincoln, Pend Oreille, Spokane, Stevens, and Whitman. The collection of field data was made during the years 1957 to 1961 in three separate inventory projects.

This publication summarizes the results of the second forest inventory of Chelan and Douglas Counties, Washington. The collection of field data outside the National Forest was initiated in Chelan County in 1959, in Douglas County in 1960, and completed in both counties in 1960. National Forest resource data were collected during the period 1952 to 1958, and revised to include the recent withdrawal of the Glacier Peak Wilderness Area.

This is the third in a series of reports on experimental fumigation of the European pine shoot moth in residential areas and nurseries. Methods and techniques derived in previous studies on single ornamentals were adapted to fumigation of a commercial nursery. An elongate cubical chamber was built for treatment of trees in rows. Fumigation of an entire commercial nursery is feasible under conditions existing in the Puget Sound area of Washington during late fall and winter. All treatments in which ground tarps were used under chambers resulted in 100- percent shoot moth control. Two...

Log production in Oregon for 1962 reached 8.5 billion board feet, the highest since 1959, with 41 percent of it coming from forest industry-owned lands. The proportion of the total cut coming from all private lands fell to 48 percent, the lowest ever, while the proportion from National Forest lands rose to 36 percent, the highest ever.

The value of lumber produced from each of 362 Shasta red fir logs of southern Oregon was determined through a cooperative study in 1960. Lumber grade yield from each log provided the basis for calculating the comparative value of each log grade-log diameter class, in accordance with grading and scaling practices used both east and west of the Cascade Range. The results, which are summarized graphically in figure 1, should be useful to sellers, buyers, and processors of Shasta red fir logs. The effect on log value of (1) log diameter, (2) log grade, as determined by two systems, and (3) log...