Methods Used to Control Pollination of Pines in the Sierra Nevada of California (Classic Reprint) PDF Download
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Author: W. C. Cumming
Publisher: Forgotten Books
ISBN: 9780265787632
Category : Science
Languages : en
Pages : 22
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Book Description
Excerpt from Methods Used to Control Pollination of Pines in the Sierra Nevada of California In the transect of the Sierra Nevada from Sacramento through El Dorado County, Pin/us ponderosa occurs over an elevational range of approximately feet (100 feet). On comparable aspects, trees at low elevations mature their flowers earlier than do those at high elevations. Thus, pollen from trees at low elevations may be in the air several weeks before trees at higher elevations mature their ovulate flowers. Between feet and feet, there is a span of approximately 35 days over which P. Ponderosa sheds its pollen. Other species of pine behave similarly. 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: W. C. Cumming
Publisher: Forgotten Books
ISBN: 9780265787632
Category : Science
Languages : en
Pages : 22
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Book Description
Excerpt from Methods Used to Control Pollination of Pines in the Sierra Nevada of California In the transect of the Sierra Nevada from Sacramento through El Dorado County, Pin/us ponderosa occurs over an elevational range of approximately feet (100 feet). On comparable aspects, trees at low elevations mature their flowers earlier than do those at high elevations. Thus, pollen from trees at low elevations may be in the air several weeks before trees at higher elevations mature their ovulate flowers. Between feet and feet, there is a span of approximately 35 days over which P. Ponderosa sheds its pollen. Other species of pine behave similarly. 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: W. C. Cumming
Publisher:
ISBN:
Category : Pine
Languages : en
Pages : 20
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Book Description
Author: Greg de Nevers
Publisher: Univ of California Press
ISBN: 0520274806
Category : Nature
Languages : en
Pages : 280
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Book Description
The California Naturalist Handbook provides a fun, science-based introduction to California’s natural history with an emphasis on observation, discovery, communication, stewardship and conservation. It is a hands-on guide to learning about the natural environment of California. Subjects covered include California natural history and geology, native plants and animals, California’s freshwater resources and ecosystems, forest and rangeland resources, conservation biology, and the effects of global warming on California’s natural communities. The Handbook also discusses how to create and use a field notebook, natural resource interpretation, citizen science, and collaborative conservation and serves as the primary text for the California Naturalist Program.
Author:
Publisher:
ISBN:
Category : Forest management
Languages : en
Pages : 108
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Book Description
Author: Carmen Milanes (Environmentalist)
Publisher:
ISBN:
Category : Climatic changes
Languages : en
Pages : 0
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Book Description
Author: Gary Snyder
Publisher: Catapult
ISBN: 1582439354
Category : Religion
Languages : en
Pages : 206
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Book Description
A collection of captivatingly meditative essays that display a deep understanding of Buddhist belief, wildness, wildlife, and the world from an American cultural force. With thoughts ranging from political and spiritual matters to those regarding the environment and the art of becoming native to this continent, the nine essays in The Practice of the Wild display the deep understanding and wide erudition of Gary Snyder. These essays, first published in 1990, stand as the mature centerpiece of Snyder's work and thought, and this profound collection is widely accepted as one of the central texts on wilderness and the interaction of nature and culture.
Author: Food and Agriculture Organization of the United Nations
Publisher: Food & Agriculture Org.
ISBN: 9251346127
Category : Social Science
Languages : en
Pages : 262
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Book Description
Bees provide a critical link in the maintenance of ecosystems, pollination. They play a major role in maintaining biodiversity, ensuring the survival of many plants, enhancing forest regeneration, providing sustainability and adaptation to climate change and improving the quality and quantity of agricultural production systems. In fact, close to 75 percent of the world’s crops that produce fruits and seeds for human consumption depend, at least in part, on pollinators for sustained production, yield and quality. Beekeeping, also called apiculture, refers to all activities concerned with the practical management of social bee species. These guidelines aim to provide useful information and suggestions for a sustainable management of bees around the world, which can then be applied to project development and implementation.
Author: Ronald Newbold Bracewell
Publisher:
ISBN:
Category : Trees
Languages : en
Pages : 332
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Book Description
Author: Anthony Larkum
Publisher: Springer Science & Business Media
ISBN: 9781402029424
Category : Science
Languages : en
Pages : 724
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Book Description
Seagrasses are unique plants; the only group of flowering plants to recolonise the sea. They occur on every continental margin, except Antarctica, and form ecosystems which have important roles in fisheries, fish nursery grounds, prawn fisheries, habitat diversity and sediment stabilisation. Over the last two decades there has been an explosion of research and information on all aspects of seagrass biology. However the compilation of all this work into one book has not been attempted previously. In this book experts in 26 areas of seagrass biology present their work in chapters which are state-of–the-art and designed to be useful to students and researchers alike. The book not only focuses on what has been discovered but what exciting areas are left to discover. The book is divided into sections on taxonomy, anatomy, reproduction, ecology, physiology, fisheries, management, conservation and landscape ecology. It is destined to become the chosen text on seagrasses for any marine biology course.
Author: Food and Agriculture Organization of the United Nations
Publisher: Food & Agriculture Org.
ISBN: 9251084351
Category : Juvenile Nonfiction
Languages : en
Pages : 240
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Book Description
This fact-filled guide explores forests from the equator to the frozen poles, the depths of the rainforest to the mountain forests at high altitudes. It also demonstrates the many benefits that forests provide us with, discusses the negative impacts that humans unfortunately have on forests and explains how good management can help protect and conserve forests and forest biodiversity. At the end of the guide, inspiring examples of youth-led initiatives and an easy-to-follow action plan will help young people develop their own forest conservation activities and projects.
