Author: Milton Whitney Publisher: Forgotten Books ISBN: 9780331505115 Category : Business & Economics Languages : en Pages : 76
Book Description
Excerpt from The Chemistry of the Soil as Related to Crop Production The objects to be attained in the management of a soil are the deter mination of the crop or crops adapted to it, the regulation Of the yield, and the control of the quality of the product. The investigations made by the Bureau of Soils during the last ten years have Shown that the economic distribution of crops is dependent mainly upon the physical characteristics of soils and upon climate. It has been believed that the chemical characteristics of soils have a more or less direct and controlling influence on the yield Of a crop On any particular soil; that is to say, where wheat yielded 10 bushels per acre in one field, and in an adjoining field (the soil of which had the same texture, so far as could be determined, although it might be in a better physical condition) 25 or 30 bushels were Obtained, this difference in yield would be found to be due to or associated with a difference in the amount of available plant food in the soil of the two fields. It was believed, further, that the better physical condition resulting through loosening up and aerating the soil and exposing it to the weathering influence of the atmosphere by better and more thorough methods Of cultivation would in itself prepare a larger amount of readily available food material for the use of crops. These two subjects, distribution and yield, are both of vital impor tance to the farmer; but While the yield of crops has been a study for the experimenter and farmer alike throughout historic times, too little attention has been paid by him to the adaptation of particular soils to crops. The yield is to-day the paramount question with the farmer, and all his energy and resources in the last analysis tend to this end. 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: Charles W. Stoddart Publisher: Forgotten Books ISBN: 9780483085312 Category : Science Languages : en Pages : 368
Book Description
Excerpt from The Chemistry of Agriculture: For Students and Farmers There is at present need for a text on general agricultural chemistry which will cover the field briefly in a logical manner, giving only the facts, and not consisting of a dis connected series of quotations and tables from the very extended literature of the subject. The need for such a text has been particularly marked in teaching large classes of students at The Pennsylvania State College. As a con sequence the present book has been written. While it is intended primarily for students who have had previous training in Botany, Chemistry, Geology and Physics, it is sufficiently elementary to make it of value to any intelligent person. Concerning some of the statements made in the text it is well known that a difference of opinion exists among authorities, but it is deemed better to present them as facts rather than to give the various arguments or to omit them altogether. 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: George Stronach Fraps Publisher: Forgotten Books ISBN: 9780332574752 Category : Business & Economics Languages : en Pages : 506
Book Description
Excerpt from Principles of Agricultural Chemistry The object of agriculture is the profitable production of useful plants and animals. Agriculture is therefore an art and not a science, since an art relates to something to be done, a science to something to be known. We may, however, speak of the science of agriculture, meaning the body of organized knowledge appertaining to this art. 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: Thomas Ellison Keitt Publisher: Forgotten Books ISBN: 9780267802005 Category : Science Languages : en Pages : 278
Book Description
Excerpt from The Chemistry of Farm Practice Life, food, and raiment are directly or indirectly de pendent upon agricultural products. In the settlement of our country, land was abundant and people were few, con sequently little thought was given to the needs of the increasing numbers of succeeding generations. As the land first cultivated lost its fertility, the tide of population turned westward where unlimited areas of virgin soil awaited the herds and plowshares of the settlers. But this fresh area has been occupied, and to maintain the fertility of; those fields that are still productive and to restore those that have become exhausted is the problem now facing agriculture. The maintenance of the fertility of a productive soil demands the intelligent application of the principles of agricultural chemistry. The restoration of wornout fields is a difficult and costly undertaking. The successful farmer must reinforce his art by the application of the fundamental information derived from the study of chemistry, geology, botany, bacteriology, and entomology. Chemistry aids agriculture in many ways. By means of it, exact data are collected and the fundamental reasons for practical results are explained. Then, too, chemistry invents new or improves old methods of fertilization. The chemist analyzes soils, manures and vegetable products. The value of soil analysis to the practical farmer, perhaps formerly overrated, in more recent years has been under rated. From a soil analysis the farmer can at least learn if his soil is unusually deficient in any important element. Chemistry also protects the agriculturist from the impositions of the unscrupulous fertilizer manufacturer. 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: Robert Warington Publisher: Forgotten Books ISBN: 9780484536875 Category : Business & Economics Languages : en Pages : 178
Book Description
Excerpt from The Chemistry of the Farm As about copies of this little book have been printed during the last ten years in England, the United States, and Belgium, I am encouraged once more to do my best to improve it, and to make such alterations and additions as the progress of Agricultural Chemistry seems to demand. 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: John F. Hodges Publisher: Forgotten Books ISBN: 9780332128597 Category : Business & Economics Languages : en Pages : 178
Book Description
Excerpt from The First Book of Lessons in Chemistry, in Its Application to Agriculture: For the Use of Farmers and Teachers The science of Chemistry has been cultivated from the most remote times, yet its history for centuries might be comprised in a few pages. At one time the slave of seekers for gold, and of dreamers after an elixir which might render man proof against the shafts of death, its language was rendered purposely obscure, so as to be unintelligible to the bulk of the people. In later times again we find it but the servant of the physician, useful in compounding the drugs which he employed, and exhibiting in its menial garb little of that important character which it has since assumed, and which leads us now to regard it as the surest interpreter of nature, and one of the most powerful instruments in advancing the civilization of the world. With the advance of scientific knowledge which has distinguished the present time, the means for diffusing it over the world have also everywhere increased. The railway, itself a noble monument of what the science of the present age has accomplished, has become one of the great instruments of extending the influence of her discoveries, and is destined to accomplish far greater things than the famous highways along which the arts and civilization of ancient Rome were carried, and will yet be the means of giving light and knowledge to the remotest corners of the land. All professions have not been equally advanced by the application of scientific knowledge. Whilst some by availing themselves of its assistance have been brought to the greatest perfection, others have for years remained stationary, or have only lately received any impulse towards improvement. Among the occupations of men upon which science until very lately cast but a feeble and uncertain light, we must place the cultivation of the soil. It would occupy too much time to investigate all the causes of this strange state of things; it is, however, well known that the art of agriculture, the most ancient as it is the most important of human occupa tions, for centuries remained almost stationary and seemingly unaffected by the onward march of society. 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: Alfred Sibson Publisher: Forgotten Books ISBN: 9780656738717 Category : Business & Economics Languages : en Pages : 252
Book Description
Excerpt from Agricultural Chemistry: A Familiar Explanation of the Chemical Principles Involved in the Operations of the Farm As most of the operations of agriculture are an exten sion or adaptation of those of Nature, it follows that all the chemical changefl involved in the phenomena of ger mination, growth, development of seeds, and final decay of plants, as well as the more important changes belong ing to animal life, must be included in the Chemistry of Agriculture. This subject will also include the changes that accompany the alteration in the quality of land, either for the worse, by exhaustion or mismanagement, or for the better, as in the reclamation of waste lands and the restoration of those whose fertility has become impaired by culture. 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: 9780365045083 Category : Science Languages : en Pages : 44
Book Description
Excerpt from The Chemistry of Steam-Heated Soils The subject of the effect which heat has upon soils 13 rather promi nently before agricultural investigators at the present time. This subject has received Increasing attention during the last decade, par ticularly from the point of view of sterilization and partial steri lization. There has been much valuable information obtained along the biological lines concerned; also much speculation in this regard without due consideration of the chemical and physical changes in volved, owing largely to the fact that these were not known or but imperfectly understood. The biological factors can not and should not be ignored, but it must be remembered that they are only of sig nificance or interest in the light Of the biochemical changes which they produce in the soil. Moreover, any biochemical changes produced in the soil through other means, be they cultural or by the addition of manures and fertilizers or by the influence of steam heating, in turn affect-the biological activities. The chemistry, therefore, of the soil both before and after heating in, sterilization work becomes of the greatest significance to the biological worker. 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: Milton Whitney
Author: Milton Whitney
Author: Charles W. Stoddart
Author: George Stronach Fraps
Author: Frank Kenneth Cameron
Author: Thomas Ellison Keitt
Author: Robert Warington
Author: John F. Hodges
Author: Alfred Sibson
Author: Oswald Schreiner