Tree Shaking Machine Aids Cone Collection In A Douglas Fir Seed Orchard

Author : Donald L. Copes
Publisher : Forgotten Books
ISBN 13 : 9781396047145
Total Pages : 22 pages
Book Rating : 4.0/5 (471 download)

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Download or read book Tree Shaking Machine AIDS Cone Collection in a Douglas-Fir Seed Orchard (Classic Reprint) written by Donald L. Copes and published by Forgotten Books. This book was released on 2018-09-09 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Tree Shaking Machine Aids Cone Collection in a Douglas-Fir Seed Orchard Orchard managers are reluctant about using shakers until it can be demonstrated that such mechanized harvesting methods are nondestructive. We decided to conduct a shaker trial in a Douglas-fir seed orchard during the 1982 cone harvest to determine if mature cones could be harvested from 7 to 9-m tall orchard trees without causing excessive tree damage. Specific evaluations were percentage of cone removal, amount of top breakage, the relationship of cone removal with amount of top breakage, and effect on cone removal and top breakage of balanced versus unbalanced weights in the shaker head. Tree shaking was carried out at the Beaver Creek seed orchard of the usda Forest Service near Corvallis, Oregon, during the last week of August 1982. Ninety-two trees were shaken. Evaluation of percent cone removal and top damage is reported on 10 to 14-year-old grafted Douglas-fir trees. Trees ranged in height from 7 to 9-m and had stern diameters that ranged from 9 to 25 cm as measured 30 cm above the graft unions. The orchard consisted of ten 2-ha blocks, but trees in only four of the blocks were shaken. Each block contained approximately 300 trees, or 10 to 15 ramets of 25 clones. Some trees produced good cone crops, but the proportion of producing trees were small. The same clones were not present in more than one block, so comparisons of treatments between blocks are limited. 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.