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Author: William Burke Critchfield Publisher: Forgotten Books ISBN: 9780260670281 Category : Science Languages : en Pages : 72
Book Description
Excerpt from The Genetics of Lodgepole Pine Lodgepole pine is a small tree, and only recently has it been heavily utilized in its native range. In northwestern Europe, however, the ability of some seed sources to grow well on poor sites and in cold climates has interested foresters for many years, and the species is now widely planted in the British Isles and Sweden. The oldest fossils of lodgepole pine are several million years old, but there is no evidence that the species was widespread until the late Pleistocene. It was an important pioneer following glacial melting, and occupied its extensive northern range by migration from the south and possibly from far-northern refugia. Lodgepole pine has been successfully crossed with only two other species: jack pine and Virginia pine. Crossability with jack pine is moderately high, and the two species hybridize naturally in Canada. Many northern Rocky Moun tain stands have jack pine-like characteristics, but the extent of introgression from jack pine is uncertain. Lodgepole x jack hybrids are fertile, but pollen abortion is sometimes high. Hybrids of Sierra Nevada parentage have not grown well in most other environments. 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: William Burke Critchfield Publisher: Forgotten Books ISBN: 9780260670281 Category : Science Languages : en Pages : 72
Book Description
Excerpt from The Genetics of Lodgepole Pine Lodgepole pine is a small tree, and only recently has it been heavily utilized in its native range. In northwestern Europe, however, the ability of some seed sources to grow well on poor sites and in cold climates has interested foresters for many years, and the species is now widely planted in the British Isles and Sweden. The oldest fossils of lodgepole pine are several million years old, but there is no evidence that the species was widespread until the late Pleistocene. It was an important pioneer following glacial melting, and occupied its extensive northern range by migration from the south and possibly from far-northern refugia. Lodgepole pine has been successfully crossed with only two other species: jack pine and Virginia pine. Crossability with jack pine is moderately high, and the two species hybridize naturally in Canada. Many northern Rocky Moun tain stands have jack pine-like characteristics, but the extent of introgression from jack pine is uncertain. Lodgepole x jack hybrids are fertile, but pollen abortion is sometimes high. Hybrids of Sierra Nevada parentage have not grown well in most other environments. 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: Frank C. Sorensen Publisher: Forgotten Books ISBN: 9780364706343 Category : Business & Economics Languages : en Pages : 44
Book Description
Excerpt from Genetic Variation and Seed Transfer Guidelines for Lodgepole Pine in Central Oregon Purposes The tests investigated source and family-related genetic variation and had three main purposes. 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: Keith William Dorman Publisher: Forgotten Books ISBN: 9780260508812 Category : Business & Economics Languages : en Pages : 34
Book Description
Excerpt from Genetics of Loblolly Pine Principal Silviculturist, usda Forest Service, Southeastern Forest Experiment Station, Asheville, nc. 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: T. D. Rudolph Publisher: Forgotten Books ISBN: 9780365794509 Category : Science Languages : en Pages : 72
Book Description
Excerpt from Genetics of Jack Pine Jack pine is an important species for planting and direct seeding in the Lake States and throughout much of the boreal forest of Canada, where it is a major source of pulpwood, lumber, and round tim ber. It is highly variable in climatic adaptation, growth, and form and exhibits great genetic diversi ty of silvicultural significance. Although referred to early in the 2oth century as a frugal scrub, its cur rent high economic value, genetic variability, silvi cultural simplicity, and ability to grow on less fer tile and drier soils than are required by other sym patric species make jack pine a prime candidate for genetic improvement by selection, breeding, and controlled seed production. Jack pine is in the Subgenus Pinus, Section Pinus, and Subsection Contortae along with lodgepole pine, Virginia pine, and sand pine. 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: Robert Clay Kellison Publisher: Forgotten Books ISBN: 9780365139799 Category : Science Languages : en Pages : 24
Book Description
Excerpt from Genetics of Virginia Pine Pinus virginiana (mill), variously known as Virginia, Jersey, possum, spruce, short straw, scrub, poverty, and old field pine, is a species of contrasts. It is despised by the logger but liked by the forester and the pulp mill manager in most areas of its range. The logger's negative reaction to Virginia pine results from the tree's small size and to its persistent branching habit, factors which adversely affect harvesting production. Dominant and codominant trees average only 23 to 25 meters tall and 28 to 30 centi meters at 50 years.2 Older trees may attain heights to 35 meters and diameters to 90 centimeters (harlow and Harrar but even they often retain branches and branch stubs the length of the bole below the live crown. Despite these deterrents, the species has gained the respect of foresters because of good volume and dry-weight yields at rota tion ages of 25 to 30 years (newland 1968, nc. State Univ. And of pulp mill managers because of suitability of the fiber for fine paper and groundwood products. These attributes are responsible for a recent planting program of several thousand acres annually. Secondary uses of Virginia pine include lumber and structural timber from sawlog-sized trees, and Christmas trees which are harvested at rotation ages of 6 to 10 years. This paper reviews the current status of research on the genetics of, Virginia pine. 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: F. Thomas Ledig Publisher: Forgotten Books ISBN: 9780364940877 Category : Science Languages : en Pages : 22
Book Description
Excerpt from Genetics of Pitch Pine At various times, pond pine was considered a variety of pitch pine and until recently was included in standard texts as P. Rigida var. Serotina (michx.) Loud. (harlow and Harrar Clausen (1939) identified pond pine as a subspecies, P. Frigida ssp. Serotina and Smouse (1971) concurs. 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: William Burke Critchfield
Author: William Burke Critchfield
Author: Frank C. Sorensen
Author: William Burke Critchfield
Author: Keith William Dorman
Author: T. D. Rudolph
Author: Robert Clay Kellison
Author: G. E. Rehfeldt
Author: F. Thomas Ledig
Author: WALTER G. DAHMS
Author: P. Knowles