Treesearch

The importance of vegetational studies in virgin forests has become more and more obvious during the past few years as a result of the increasing scarcity of primeval areas. The work of Cooper ('13) on Isle Royale, Michigan; of Nichols ('13) at Colebrook, Connecticut; of Lutz ('30) at Heart's Content, Pennsylvania; of Gates and Nichols ('30) studying an area near Pellston, Michigan; and of Hough ('32) in Pennsylvania, may be said to compose the greatest portion of the meagre literature on this subject.

The necessity of forest-fire protection is generally recognized in the United Slates. The tremendous damage done by forest fires each year to valuable timber, watershed cover, forest range, wildlife, recreational facilities, and personal property has impressed upon the people the need for preventing and controlling forest fires so far as this is humanly possible.

In formulating methods for effecting forest regeneration, considerable information is needed as to the germination habits of the species involved. Studies of germination habits have been made for several species in the western white pine type, but heretofore no sufficiently detailed investigation has been made covering the germination habits of all the principal tree species of this type.

Preliminary investigations in the detection of forest fires at the California Forest and Range Experiment Station were based on the assumption that the visibility of smoke columns in the field would vary as the visibility of the landscape with varying conditions of atmospheric suspensoid concentration and with the position of the sun. This led to the determination of the effect of direction of the sun with respect to the observer's line of sight upon the visibility of natural features in the landscape through analysis of a large number of lookout observations of natural targets on the...

This report presents information concerning the quantity of pulpwood in survey unit #1, Florida. The geographic location of this unit which includes twenty-one counties in the northeastern part of the state is shown in Figure 1. The boundary of the Ocala National Forest. The data given in this release are preliminary and are subject to correction and modification when final computations are completed. It is believed, however, that the changes in estimates of pulpwood will neither be extensive nor important. The information is given in advance of the publication of a comprehensive report...

Increasing attention is being given to the possibility of making the United States permanently self sufficient in its paper, pulp, and pulpwood requirements. A steady increase in consumption of paper and other wood-cellulose products, accompanied by a corresponding increase in imports of paper, pulp, and pulpwood, has aroused considerable interest in the quantity of standing timber in this country suitable for pulpwood. Any significant expansion of pulpwood production in the United States can take place only in the Pacific Northwest, in Alaska, or in the South.

This issue of Forest Research Notes is devoted to abstracts of projects under way or recently completed by the Section of Forest Products. This section conducts research designed to contribute to better and more economic utilization of the products of the forest. As shown by the variety of subjects presented in these notes, the projects range from the statistics of production, which is carried on in cooperation with the Bureau of the Census, through the improvement of manufacturing methods, to improvements in the utilization of unavoidable waste in both woods and mill. Its research is by...

The Beaufort scale of wind force, internationally employed by weather agencies, was not designed for use on mountainous and forested areas like those of the Rocky Mountains of northern Idaho and western Montana. The United States Forest Service has used it to estimate wind velocities in this region, but has found that in too many cases the resulting estimates were inaccurate: In the northern Rocky Mountain region the scheme of forest fire protection demands reliable estimates of wind velocity. Wind exerts an important influence upon the rate at which forest fuels dry and upon the rate at...

During the middle of the nineteenth century forests were believed to have important influences on climate. As climate was more thoroughly understood it became evident that the major climatic controls were beyond the influence of forest cover, a finding which wholly discredited the earlier conclusions. It was evident to the forester and student of ecology, however, that a forest stand has important and under certain conditions critical influence upon plant succession. Accordingly, attention was given to local climate, or micro-climate. An understanding of the significance of the influence...

Object To determine the growth rate and net growth, and to determine the rate of restocking after a light, a moderate and a heavy selection cutting.