Excerpt from Aeration and Air-Content: The Role of Oxygen in Root Activity In spite of the enormous amount of work done upon the respira tion of roots and the significance of soil-air, physiologists and eco logists generally have ignored this subject or have given it little consideration. A cursory survey of a score of text-books shows that the air-content of the soil is not even mentioned by the majority, while it is given slight attention by a few, and accorded recognition as a factor of primary importance by three or ...
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Excerpt from Aeration and Air-Content: The Role of Oxygen in Root Activity In spite of the enormous amount of work done upon the respira tion of roots and the significance of soil-air, physiologists and eco logists generally have ignored this subject or have given it little consideration. A cursory survey of a score of text-books shows that the air-content of the soil is not even mentioned by the majority, while it is given slight attention by a few, and accorded recognition as a factor of primary importance by three or four only. This was probably a natural outcome of the laboratory development of physi ology. At least, it appears certain that the basic importance of the air-content of the soil could not be appreciated fully until ecology had begun the instrumental measurement of the habitat. Even the latter has found it difficult to distinguish between sequelae and causes in this field (plant Succession, p. And general recognition of air-content as a primary factor in many habitats, and a controlling one in wet soils and water, is yet to come. In the following treatise, the development of our knowledge of the respiration of roots and other underground parts is first taken up in historical sequence, together with an account of studies deal ing with the nature and composition of soil-air. This is succeeded by a digest of results in the field of anaerobic respiration, with especial reference to its relation to germination, growth, and move ment. A section is devoted to bog xerophytes and swamp plants, with which are considered bog toxins and acid soils, while soil toxins and toxic exudates are discussed in a final section. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at ... 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.
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