Certain Organic Constituents of Soils in Relation to Soil Fertility (Classic Reprint) PDF Download

Author: Oswald Schreiner
Publisher: Forgotten Books
ISBN: 9781396035807
Category : Science
Languages : en
Pages : 536

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Book Description
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.