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Excerpt from Cone and Seed Yields in Young Western White Pines
In the course of breeding western white pine (pinus monticola Dougl.) for resistance to blister rust (see Bingham, Olson, Becker, and others. 1969 and earlier), 18 years of data on cone and seed yields of individual trees from different geographic local ities have been accumulated. The protection of cones during development minimized losses due to insects and rodents; therefore, these data simulate the full reproductive potential of young trees in natural stands. Annual variation in cone production among geographic localities and individual trees thus is represented in these data. This information is indis pensable for practices of seed collection and seed orchard management which rely on knowledge relating to cone yields of individual trees and possibly on yields derived from controlled pollinations.
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Cone and Seed Yields in Young Western White Pines (Classic Reprint)
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Paperback. Zustand: New. Print on Demand. This book, a collaborative effort by two forestry experts, examines the development of western white pines and the factors that influence their cone and seed production over an 18-year study. It delves into the variability of cone production among geographic localities, individual trees, and years, providing valuable insights for forest management practices. The authors meticulously analyze the impact of exogenous factors such as seed year and elevation, as well as potential genetic influences on seed yields. Their findings highlight the importance of considering these variations in cone production to maximize cone and seed collection efficiency. The book also explores the effects of wind cross and self-pollination on seed yields, offering crucial information for seed orchard management. Overall, this comprehensive study provides significant knowledge about the reproductive ecology of western white pines, helping to inform forest management strategies and contribute to the preservation of these majestic trees. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item. Bestandsnummer des Verkäufers 9780428007607_0
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