Disintegration of Girdled Western Hemlock and Grand Fir (Classic Reprint) PDF Download

Author: Austin Edward Helmers
Publisher: Forgotten Books
ISBN: 9780331452907
Category : Business & Economics
Languages : en
Pages : 40

Get Book

Book Description
Excerpt from Disintegration of Girdled Western Hemlock and Grand Fir The occurrence of overmature defective trees is responsible for some of the most difficult management problems in the western white pine type. Grand fir and'western hemlock in particular are highly susceptible to Woodarotting fungi. In addition, because of their shade tolerance, they often inhibit or prevent establishment and growth of the more desirable but less shade-tolerant species such as western white pine. Hence, many of the management practices for the white pine type provide for the re moval of trees of undesirable form, condition, or species. Girdling is one method of removing such trees. This method was exten sively used by the U. S. Forest Service between 1915 and 1930 on timber sales in the western white pine type. Although girdling lowhvalue trees 'was discontinued as a stand improvement measure after 1930 because of the high fire hazard of the resulting snags (figure there were reasons to consider the method worthy of further study. For example, it is a com paratively cheap and effective'way to destroy an occasional large tree, such as a wolf tree which is suppressing desirable reproduction. Tests 2/ 1tere made, accordingly, to determine the effect of girdling on cone pro duction, mortality, rate of disintegration of trees, end.damage to repro duction. Results of these studies are described in this report. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.