Author: Edmund Cecil Shorey
Publisher: Forgotten Books
ISBN: 9781390519891
Category : Science
Languages : en
Pages : 56
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Excerpt from Some Organic Soil Constituents A continuation of the investigation into the nature of the organic. Matter of soils, begun by the Bureau of Soils a few years ago-and reported in previous bulletins 1 has resulted in considerable additional information regarding the chemical identity of the compounds in this complex mixture. It is the purpose of the present bulletin to report the isolation of a number of organic compounds found in soil organic matter not included in previous publications of this laboratory. The methods by which these compounds have been isolated will be described, their properties noted, and their possible origin considered. 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: Oswald Schreiner
Publisher: Forgotten Books
ISBN: 9780266275879
Category : Business & Economics
Languages : en
Pages : 22
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Excerpt from The Organic Constituents of Soils The soil is not simple, but complex. The soil properties and functions are likewise complex, not simple. All of the investigators preceding me in this symposium have emphasized to you by their papers how complex the subject is and how much remains to be done before a clear insight is Obtained, but they have also shown to you clearly that a well-trained army of scientists is at work on the prob lems connected with soil fertility, applying. Thereto all the principles of modern science. The Old view was simplicity itself; the soil was a mere trough in which the plant found its nourishment. But I can do no better than to let Liebig speak for himself. I quote from Letter XII of his Familiar Letters on Chemistry A field in which we cultivate the same plant for several successive years becomes barren for that plant in a period varying with the nature of the soil; in one field it will be three, in another seven, in a third twenty, in a fourth a hundred years. One field bears wheat and no peas; another beans and turnips but no tobacco; a third gives a plentiful crop of turnips but will not bear clover. What is the reason that a field loses its fertility for one plant, the same which at first flourished there? What is the reason one kind of plant succeeds in a field where another fails? 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: Oswald Schreiner
Publisher: Forgotten Books
ISBN: 9781396035807
Category : Science
Languages : en
Pages : 536
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Excerpt from Certain Organic Constituents of Soils in Relation to Soil Fertility The work of isolating and studying the nature of such. Bodies is now in progress, but it is necessarily slow and difficult to accomplish. In the first place, the amount may be very small, and, secondly, the 'composition of the organic matter of the soil is undoubtedly very complex, being made up of many individual organic compounds. The absorptive power of the soil for organic bodies is so very great that the ordinary solvents, such as water, alcohol, chloroform, etc., take out but very minute amounts of organic material, .although this material may be quite soluble when not associated with the soil. The amounts of organic matter in ordinary soils is really. Appreciably large, the average content being as high as per cent for the soil and per cent for the subsoil, as found in thousands of sam ples from all parts of the United States, covering in all 237 types of soil. It Is obvious that this organic matter is of very complex com position, as its properties are quite different in soils from different localities. The amount of nitrogen also is considerable, as much as to per cent, and when we consider that only a small amount of this nitrogen is in the form of ammonium compounds or nitrate and that the larger amount is in organic form it is obvious that the problem Is a very complex one, but one of great agricultural importance. 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: Edmund Cecil Shorey
Publisher:
ISBN:
Category : Soils
Languages : en
Pages : 41
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Author: United States. Department of Agriculture
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Edmund C. (Edmund Cecil) 1865-1 Shorey
Publisher: Wentworth Press
ISBN: 9781373913296
Category : History
Languages : en
Pages : 56
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Book Description
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: Frank Kenneth Cameron
Publisher: Forgotten Books
ISBN: 9780483096875
Category : Science
Languages : en
Pages : 76
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Excerpt from The Mineral Constituents of the Soil Solution Of no less importance are the organic constituents of the soil solution, but these will not be considered in the present bulletin, except incidentally as they affect the mineral constituents. 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: Oswald Schreiner
Publisher: Forgotten Books
ISBN: 9781396041273
Category : Science
Languages : en
Pages : 48
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Excerpt from Examination of Soils for Organic Constituents, Especially Dihydroxystearic Acid There have been isolated from soil organic matter since this work was begun in these laboratories a large number of compounds 1 which are so varied in their composition, properties, and origin that they may be said to cover fairly well the principal classes of com pounds encountered in other lines of biochemistry, and, therefore, the knowledge in regard to the chemical relationship, origin, and pro cesses of change accumulated in such other lines can be directly applied to the understanding of the biochemical changes in soils and the constitution of soil organic matter. 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: Edmund Cecil Shorey
Publisher:
ISBN:
Category :
Languages : en
Pages : 41
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Author: Oswald Schreiner
Publisher: Forgotten Books
ISBN: 9780364417850
Category :
Languages : en
Pages : 60
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Excerpt from A Beneficial Organic Constituent of Soils, Creatinine: Introduction; Importance of Beneficial Soil Constituents; The Isolation of Creatinine From Soils, the Origin of Creatinine in Soils, Effects of Cretinine on Growth and Absorption There have appeared a number of bulletins from this laboratory dealing with the nature and properties of soil organic matter. The extendedpstudy of this subject, about which so little definite informa tion existed in chemical and agricultural literature, was undertaken as a result of the discovery of a harmful property in extracts from unproductive soils which was shown to be organic in character rather than inorganic. An investigational survey of organic compounds likely to occur in soils showed that some of these had decided effects on plant growth, and an examination of the organic matter of un productive soils led to the discovery and isolation of several harmful constituents. The details of these investigations, as well as the effect of such Substances in hindering plant growth, interfering with the normal processes of plant life and plant metabolism, have been given in the earlier reports of these investigations. All of these facts Showed the great importance of more accurate knowledge concerning that most important and yet least understood Soil constituent, the organic matter or humus of soils. A thorough inquiry into the nature of this material has been made in this laboratory and already a considerable fund of definite information is at hand. Starting without methods and with no definite organic soil constituent ever isolated from soil, the work has steadily progressed until to-day over 25 organic soil constituents have been isolated, definitely identified, and classified. The list of the compounds so far isolated varies from simple com pounds, containing only carbon and hydrogen, to complex compounds, containing carbon, hydrogen, oxygen, nitrogen, and phosphorus. They are compounds which exist as such in living plants or arise from the decay or decomposition of the proteins, fats, nucleic acids, carbo hydrates, and other plant and animal substances, as the result of purely chemical oxidations and reductions and through the inter vention of molds, bacteria, protozoa, and other biological influences in soils. According to the factors Operative in the decay of this plant and animal debris, the course of change will be different, resulting under one set of conditions in the formation of the abnormal and harm ful constituents alluded to above and under other conditions In the formation of normal or beneficial organic constituents of soils. 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.
