The Organic Constituents Of Soils Classic Reprint

Excerpt from The Organic Constituents of Soils The reports on the various phases of soil studies by the investigators who have preceded me in this symposium must have impressed you with the fact that the subject of soil fertility and infertility is by no means a simple matter of arithmetic, which involves only a few of the mineral constituents of the soil. It must also have become clear to you that the problem of soil fertility or infertility has not been solved by the application of these simple arithmetical means based on soil analysis or by the crop statistics accumulated in the years which have elapsed since Liebig first announced his views on soil fertility, which gamed for him for all time the title of "Father of Agricultural Chemistry." It is particularly gratifying to me, since I am to talk to you to-day on the subject of the organic constituents of soils, their chemical nature and other properties, that Liebig is also known as the "Father of Organic Chemistry." To what tremendous proportions and significance in the worlds industries and science this child of his (Organic Chemistry) has grown is familiar to all of you, and I assure you that Liebig, were he to return to-day, would be proud of its parentage. But I fear he would be displeased with his other child, as having made so little progress in the intervening years, although he started it in life strong and virile and full of promise. Up to a few years ago agriculture had not shared in the great impulses which modern science has given to other arts and industries, and the domination of the mineral-requirement theory proposed in the first half of the last century and accepted without adequate proof of its validity is largely responsible for the lack of development in agriculture, commensurate with the enormous strides of other arts and industries under the guidance of modern scientific thought and research. But a new era of scientific inquiry is at hand, and all phases of scientific endeavor are being applied to the solution of the problems connected with soil fertility and infertility - lines of endeavor which were not even known in Liebig's time, but which to-day are well-recognized factors in soil fertility. 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.

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Excerpt from Washington Soils From the above brief discussion it will be apparent that soil consists essentially of two major constituents, namely mineral matter, or rock waste, and organic matter, or vegetable matter in various stages of decay. 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.

Excerpt from Some Relations of Organic, Matter in Soils: A Thesis Presented to the Faculty of the Graduate School of Cornell University for the Degree of Doctor of Philosophy The effect of lime on the organic matter in soils has been for some time one of the leading problems for investigation. The results that have been recorded, however, are not consistent. Some investigators have reported that there is a greater accumulation of organic matter in limed than in unlimed soil, while others have stated the contrary. This difference of opinion is not surprising when the methods of experimentation, the soil variations, and the climatic conditions are considered. There has been, however, too great a tendency to draw conclusions from unreliable data. In many cases, attempts have been made to study the effect of lime on the organic matter in soils without a knowledge of the composition of the soils before treatment. In view of the many discrepancies in the reported results. the present experiment was designed to ascertain the effect of lime on the organic matter in soils under various treatments and cropping systems. Historical Wheeler and others(1899) reported that lime decreased the percentage of humus in soils under continuous culture of cereals. They found also that there was an increase of roots and residual organic matter in limed grass plats as compared to those not limed. Hess (1901) studied the effect of lime on some of the Pennsylvania soils. He stated that liming resulted in a diminution of the nitrogen. Kossovich and Tretjakov (1902)stated that the addition of calcium carbonate to soil retarded the decomposition of organic matter. Hartwell and Kellogg(1906) pointed out that the amount of humus in limed plats was less than that in unlimed plats. They stated also that the effect produced by lime upon the organic matter of a given soil was dependable to a considerable extent on the degree of acidity or of alkalinity of the soil. 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.

Excerpt from Quantitative Relationships of Carbon, Phosphorus, and Nitrogen in Soils Carbon may exist in soils as inorganic and as organic carbon. The agricultural value of organic carbon, or organic matter, of soils has long been recognized by the practical husbandman, and the scientific man early recognized its value when the applications of science were made to agricultural problems. Mulder (i), in 1844, made an elaborate study of the organic matter of the soil, and seems to have been the first one to suggest that it consisted of other elements than carbon, hydrogen and oxygen. He separated the organic matter into various supposedly pure organic compounds of an acid nature, which were analyzed and studied by the usual organic method. 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.

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