Production Rates in Commercial Thinning of Young-Growth Douglas-Fir (Classic Reprint)
Production Rates in Commercial Thinning of Young-Growth Douglas-Fir (Classic Reprint)

Author: Thomas Cooper Adams

Publisher: Forgotten Books

Published: 2018-09-11

Total Pages: 50

ISBN-13: 9781390390087

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Excerpt from Production Rates in Commercial Thinning of Young-Growth Douglas-Fir Machine rates were developed from data supplied by equipment dealers, manufacturers, and logging operators. 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.

Silvicultural Options for Young-growth Douglas-fir Forests
Silvicultural Options for Young-growth Douglas-fir Forests

Author:

Publisher:

Published: 2004

Total Pages: 128

ISBN-13:

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This report describes the origin, design, establishment and measurement procedures and first results of a large long-term cooperative study comparing a number of widely different silvicultural regimes applied to young-growth Douglas-fir (Pseudotsuga menziesii) stands managed for multiple objectives. Regimes consist of (1) conventional clearcutting followed by intermediate thinning; (2) retention of reserve trees to create a two-aged stand; (3) small patch cuts dispersed within a thinned matrix, repeated at approximately 15-year intervals to create a mosaic of age classes; (4) group selection within a thinned matrix on an approximate 15-year cycle; (5) continued thinning on an extended rotation; and (6) an untreated control. Each of these regimes is on operationsize units (about 30 to 70 acres each). Output variables to be evaluated include conventional timber growth and yield statistics, harvest costs, sale layout and administration costs, aesthetic effects and public acceptance, soil disturbance, bird populations, and economic aspects. Descriptive statistics and some initial results are presented for the first replicate, established in 1997-98.