Spectroradiometric analyses were made to examine the light filtering capacity of coniferous forests and to establish the lower light energy limits for growth of Pseudotsuga menziesii (Mirb. ) Franco, Abies concolor (Gord. and Glend.) Lindi. and Pinus ponderosa Dougi. Visible energy(400-750 nm) was recorded at 48 points under four mixed...
The purpose of this thesis is to outline the principles involved in the reconnaissance, survey, and design of forest roads in the Douglas-fir Region. The reconnaissance survey is the most important element in road location. Poor reconnaissance often results in abandonment of the route at considerable expense. The ground slope...
In the preparation of this thesis, the writer does not claim to have discovered any great truths or their underlying causes. As the title indicates, the work is a summary of some of the more important investigational activities on the McDonald Forest. This line of endeavor was chosen because it...
Road changing i.s the activity of moving operating lines
on a cable yarding operation to permit access to logs in an
unyarded portion of a logging unit. The time required to
perform this activity varies widely and may consume a significant
portion of the total yarding time.
With rising costs...
The experiment described in this paper was designed and carried out to study the ability of five provenances of white spruce of acid soil origin and five provenances of basic soil origin grown on an did and a basic soil to utilize and respond to the five macro-nutrient elements N,...