Publications Related to the Work of the Desert Botanical Laboratory of the Carnegie Institution of Washington, 1903-1940 PDF Download

Author: William Grovenor McGinnies
Publisher:
ISBN:
Category : Botany
Languages : en
Pages : 100

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Author: Warren F. Steenbergh
Publisher:
ISBN:
Category : Botany
Languages : en
Pages : 268

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Author: Warren F. Steenbergh
Publisher:
ISBN:
Category : Desert ecology
Languages : en
Pages : 266

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Author:
Publisher:
ISBN:
Category : Botany
Languages : en
Pages : 582

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Author: Frederick Vernon Coville
Publisher:
ISBN:
Category : Botanical laboratories
Languages : en
Pages : 0

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Author: Frederick Vernon Coville
Publisher: Forgotten Books
ISBN: 9780266982760
Category : Science
Languages : en
Pages : 128

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Excerpt from Desert Botanical Laboratory of the Carnegie Institution Several investigators, in Experiment Stations and other branches of government inquiry, have made special studies of the relations of plants to alkaline and other soils. They have also observed the be havior of plants in arid regions under the influence of irrigation. For the most part, both of these classes of studies were concerned with special and local problems, the immediate purpose of such study being to obtain information for the use of the agriculturist and horticulturist. Despite this limitation they clearly showed the need of a broader and more thorough study of the technical and general aspects of the rela tion of plants to dry climates and to substrata of unusual composition. Special mention should here be made of the results obtained by Messrs. Kearney and Cameron, who have investigated the separate and the combined effect upon plants of the substances usually found in alka line soils. Other important papers are cited in the accompanying bibliography, pages 53 to 58. 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: Daniel Trembly 1865-1958 Macdougal
Publisher: Wentworth Press
ISBN: 9781361789308
Category : History
Languages : en
Pages : 134

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This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

Author: Ervin M. Schmutz
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 184

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Author: Frederick Vernon Coville
Publisher: Rarebooksclub.com
ISBN: 9781230138596
Category :
Languages : en
Pages : 26

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1903 edition. Excerpt: ...are characterized by a lack of running streams, or of a permanent run-off, although in some instances these districts may be traversed by large rivers which have their sources in distant mountain ranges as in the case of the Nile in Africa and of the Colorado river in America. The rainfall in a desert may be so heavy at certain seasons as to produce torrents of great volume, which rushing downward over the slopes and mountain sides, wear distinct streamways extending out into the plains below in some instances for miles; but the flow soon ceases after the rains have passed and the stream beds become dusty channels until the next rainy season. Striking examples of such streamways are to be seen in the great Sonoran desert in northwestern Mexico. It is evident that districts in which the average rainfall is not much greater than the evaporation are in a very critical condition, since in seasons of minimum precipitation the amount of water received may be less than that lost, and drought may result, often with direful effects on agricultural operations and economic conditions in general. The seasonal distribution of the rainfall is a matter of importance in regions where evaporation is nearly as great as precipitation. If the rainfall occurs within a brief period the remainder of the year must be extremely dry and the region will show distinct desert conditions with a tendency on the part of the native plants to develop marked storage capacity for water. The distribution of the scanty rainfall throughout the year in any region will favor the development of slowly growing xerophytic forms. These factors are further considered on page 28. Arid deserts occur in all of the great land divisions and reach an enormous extent in Africa, Asia, and...

Author: William Austin Cannon
Publisher:
ISBN:
Category : Botany
Languages : en
Pages : 0

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