Laminated Root Rot of Douglas-Fir in Western Oregon and Washington (Classic Reprint) PDF Download
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Author: Thomas White Childs Publisher: Forgotten Books ISBN: 9781396057823 Category : Business & Economics Languages : en Pages : 40
Book Description
Excerpt from Laminated Root Rot of Douglas-Fir in Western Oregon and Washington It is important primarily as a killer. Young infected trees seldom survive long enough for reduction of growth rate or extension of decay into the butt log to be of much consequence. In old-growth stands, where killing is slower, infection is less common, and decay usually extends only a few feet into butt logs and involves mostly the low-quality core. This paper summarizes results obtained during the past 20 years from research still in progress. 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.
Author: Thomas White Childs Publisher: Forgotten Books ISBN: 9781396057823 Category : Business & Economics Languages : en Pages : 40
Book Description
Excerpt from Laminated Root Rot of Douglas-Fir in Western Oregon and Washington It is important primarily as a killer. Young infected trees seldom survive long enough for reduction of growth rate or extension of decay into the butt log to be of much consequence. In old-growth stands, where killing is slower, infection is less common, and decay usually extends only a few feet into butt logs and involves mostly the low-quality core. This paper summarizes results obtained during the past 20 years from research still in progress. 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.
Author: Richard L. Williamson Publisher: Forgotten Books ISBN: 9781396197420 Category : Business & Economics Languages : en Pages : 32
Book Description
Excerpt from Initial Thinning Effects in 70-to 150-Year-Old Douglas-Fir-Western Oregon and Washington The present inventory of post-rotation-aged Douglas-fir is so large that immediate harvest cutting is not a practical alternative for all such stands for all owners. Table 1 lists the volume and acreage of Douglas-fir stands in western Oregon and Washington in 1968 by 20 and 30-year age classes. At the average annual rate of cutting million board. 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.
Author: United States Department of Agriculture Publisher: CreateSpace ISBN: 9781508798118 Category : Languages : en Pages : 44
Book Description
A 4-year-old Douglas-fir plantation in the western Washington Cascades was monitored for 8 years after fertilization with potassium (K), nitrogen (N), and K+N to determine fertilizer effects on rates of mortality from laminated root rot (LRR) and other causes relative to a nonfertilized control. Each element was applied at a rate of 300 lb/acre on and around 0.2-acre plots replicated seven times in a randomized complete block design. Cumulative mortality from LRR did not differ significantly among fertilizer treatments, and losses were strongly related to density of infected stumps from the previous stand (r2 = 0.74). Mortality from disease and other sources accelerated during the 8 years of monitoring. Average tree growth and stand volume were greatest in treatment N and were reduced where N was combined with K. Continued monitoring is needed to identify potential longer term effects of the fertilizer treatments on susceptibility of Douglas-fir to LRR and Armillaria spp.
Author: Thomas White Childs
Author: Thomas White Childs
Author: Thomas White Childs
Author: Pacific Northwest Forest and Range Experiment Station (Portland, Or.)
Author: 
Author: Thomas White Childs
Author: Richard L. Williamson
Author: Richard E. Miller
Author: E. E. Nelson
Author: Kenneth H. Wright
Author: United States Department of Agriculture