Control of Red Alder by Cutting (Classic Reprint)

Download or read book Control of Red Alder by Cutting (Classic Reprint) written by Dean S. Debell and published by Forgotten Books. This book was released on 2017-12-12 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Control of Red Alder by Cutting The study consisted of 20 installations and was established as a split-plot design. The main plot treatments were month of cut and tree age; the subplot treatments were height and angle of cutting. One installation of each tree age (4, 6, 8, and 10 years) was established in the Forest each month from May through September 1984. The ages of trees to be cut in each installation were randomly assigned to each of the four Ranger Districts; resident silviculturists then located appropriate areas for plots (table At each installation, 60 stumps were cut level, 20 each at heights of 10, 20, and 30 centimeters. Angled cuts were made on 20 stumps at each installa tion; the cut was an average of 20 centimeters in height and was slanted at 45° to either the northeast (10 stumps) or southwest (10 stumps). All cuts were made with chain saws. This design provided a statistical test of the main effects of month of cut, tree age, and cutting treatment on various sprouting characteristics. It also provided a test of the interactions between cutting treatments and age and between cutting treatments and month of cut (table The tree age x month of cut interaction was assumed to be insignificant, and this interaction served as the error estimate to test main-plot effects (age and month of cut). This assumption was subsequently verified with Tukey's single degree of freedom test for nonadditivity (steel and Torrie The second-order interaction among the three principal factors was not assessed because such a design would have expanded the study beyond available resources. 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.