Genetic Variation in Blue Spruce: A Test of Populations in Nebraska (Classic Reprint) PDF Download
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Author: David F. van Haverbeke Publisher: Forgotten Books ISBN: 9781396248252 Category : Business & Economics Languages : en Pages : 20
Book Description
Excerpt from Genetic Variation in Blue Spruce: A Test of Populations in Nebraska The Great Plains is a region with few native ever green species. One of the objectives of tree improvement research in this region is to introduce, test, and identify adapted seed sources of coniferous species for use in Great Plains windbreak, environmental improvement and esthetic plantings. Blue spruce (picea pungens because of its desirable foliage color and symmetry, is a highly valued species in the northern half of the United States and in Canada for landscaping and Christmas tree production. Because it is cold-hardy, drought-resistant, and long lived, blue spruce is also a desirable species for use in shelterbelt plantings, especially in the eastern part of the central and northern Great Plains and in the Prairie Provinces of Canada. Identification of blue spruce seed sources that are adapted to particular planting sites would increase the number of evergreen species suit able for planting in the North American prairie-plains. 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: David F. van Haverbeke Publisher: Forgotten Books ISBN: 9781396248252 Category : Business & Economics Languages : en Pages : 20
Book Description
Excerpt from Genetic Variation in Blue Spruce: A Test of Populations in Nebraska The Great Plains is a region with few native ever green species. One of the objectives of tree improvement research in this region is to introduce, test, and identify adapted seed sources of coniferous species for use in Great Plains windbreak, environmental improvement and esthetic plantings. Blue spruce (picea pungens because of its desirable foliage color and symmetry, is a highly valued species in the northern half of the United States and in Canada for landscaping and Christmas tree production. Because it is cold-hardy, drought-resistant, and long lived, blue spruce is also a desirable species for use in shelterbelt plantings, especially in the eastern part of the central and northern Great Plains and in the Prairie Provinces of Canada. Identification of blue spruce seed sources that are adapted to particular planting sites would increase the number of evergreen species suit able for planting in the North American prairie-plains. 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: David F. Van Haverbeke Publisher: ISBN: Category : Spruce Languages : en Pages : 12
Book Description
Analyses of 43 blue spruce populations at age 12 (9 years in the field) revealed significant differences among populations for survival, height, vigor, crown diameter, frost injury, and foliage color. Use of regions increases the probability of locating better seeds sources, but high variability among individual populations within regions limits their value in specifying where better seed sources can be collected. Phenotypes should be selected in best stands within regions.
Author: J. W. Hanover Publisher: Forgotten Books ISBN: 9780364749524 Category : Science Languages : en Pages : 24
Book Description
Excerpt from Genetics of Blue Spruce: Reference Abstract The female strobili vary in color from white to green to red at the time of receptivity. Male strobili vary from yellowish white to yellow tinged with pink. As color of strobili on a tree is consistent from year to year, this trait appears to be under genetic control. 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: Hans Nienstaedt Publisher: Forgotten Books ISBN: 9780365641049 Category : Science Languages : en Pages : 38
Book Description
Excerpt from The Genetics of White Spruce Research on the genetic variation of the spe cies, which began during the 3o's in both Can ada and the United States, has shown that it is a highly variable species with a great poten tial for genetic improvement. 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: Charles J. Krebs Publisher: Benjamin-Cummings Publishing Company ISBN: 9780321068798 Category : Science Languages : en Pages : 695
Book Description
This best-selling majors ecology book continues to present ecology as a series of problems for readers to critically analyze. No other text presents analytical, quantitative, and statistical ecological information in an equally accessible style. Reflecting the way ecologists actually practice, the book emphasizes the role of experiments in testing ecological ideas and discusses many contemporary and controversial problems related to distribution and abundance. Throughout the book, Krebs thoroughly explains the application of mathematical concepts in ecology while reinforcing these concepts with research references, examples, and interesting end-of-chapter review questions. Thoroughly updated with new examples and references, the book now features a new full-color design and is accompanied by an art CD-ROM for instructors. The field package also includes The Ecology Action Guide, a guide that encourages readers to be environmentally responsible citizens, and a subscription to The Ecology Place (www.ecologyplace.com), a web site and CD-ROM that enables users to become virtual field ecologists by performing experiments such as estimating the number of mice on an imaginary island or restoring prairie land in Iowa. For college instructors and students.
Author: N.C. Stenseth Publisher: Springer Science & Business Media ISBN: 9401123381 Category : Science Languages : en Pages : 359
Book Description
4.1.1 Demographic significance Confined populations grow more rapidly than populations from which dispersal is permitted (Lidicker, 1975; Krebs, 1979; Tamarin et at., 1984), and demography in island populations where dispersal is restricted differs greatly from nearby mainland populations (Lidicker, 1973; Tamarin, 1977, 1978; Gliwicz, 1980), clearly demonstrating the demographic signi ficance of dispersal. The prevalence of dispersal in rapidly expanding populations is held to be the best evidence for presaturation dispersal. Because dispersal reduces the growth rate of source populations, it is generally believed that emigration is not balanced by immigration, and that mortality of emigrants occurs as a result of movement into a 'sink' of unfavourable habitat. If such dispersal is age- or sex-biased, the demo graphy of the population is markedly affected, as a consequence of differ ences in mortality in the dispersive sex or age class. Habitat heterogeneity consequently underlies this interpretation of dispersal and its demographic consequences, although the spatial variability of environments is rarely assessed in dispersal studies.
Author: Jud G. Isebrands Publisher: CABI ISBN: 1780641087 Category : Technology & Engineering Languages : en Pages : 700
Book Description
Poplars and willows form an important component of forestry and agricultural systems, providing a wide range of wood and non-wood products. This book synthesizes research on poplars and willows, providing a practical worldwide overview and guide to their basic characteristics, cultivation and use, issues, problems and trends. Prominence is given to environmental benefits and the importance of poplar and willow cultivation in meeting the needs of people and communities, sustainable livelihoods, land use and development.
Author: R. Bruce Allison Publisher: Wisconsin Historical Society ISBN: 0870203703 Category : History Languages : en Pages : 128
Book Description
In Every Root an Anchor, writer and arborist R. Bruce Allison celebrates Wisconsin's most significant, unusual, and historic trees. More than one hundred tales introduce us to trees across the state, some remarkable for their size or age, others for their intriguing histories. From magnificent elms to beloved pines to Frank Lloyd Wright's oaks, these trees are woven into our history, contributing to our sense of place. They are anchors for time-honored customs, manifestations of our ideals, and reminders of our lives' most significant events. For this updated edition, Allison revisits the trees' histories and tells us which of these unique landmarks are still standing. He sets forth an environmental message as well, reminding us to recognize our connectedness to trees and to manage our tree resources wisely. As early Wisconsin conservationist Increase Lapham said, "Tree histories increase our love of home and improve our hearts. They deserve to be told and remembered."
Author: David F. van Haverbeke
Author: David F. van Haverbeke
Author: David F. Van Haverbeke
Author: David F. Van Haverbeke
Author: J. W. Hanover
Author: Hans Nienstaedt
Author: Charles J. Krebs
Author: N.C. Stenseth
Author: 
Author: Jud G. Isebrands
Author: R. Bruce Allison