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Excerpt from Fertilizers in Relation to Soils and Crop Production Is required. He must also know something about the available supply of plant foodinthesoflandthenatureofthefertilizerbeinguaed.thesefem'tilizereare. 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 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.
Excerpt from Manures and Fertilizers: A d104-Book for College Students and a Work of Reference for All Interested in the Scientific Aspects of Modern Farming Care has been taken to discuss the reasons for many of the conflicting Opinions on various subjects, in the belief that those entering upon agricultural research work should be taught to give such matters more careful consideration than is frequently the case. No apology is offered by the writer for the frequent refer ence to certain lines of research work at the Rhode Island agricultural experiment station, for the reason that he can speak of these results in a more authoritative way than of work done elsewhere. Furthermore, the work has been, in some respects, of a pioneer character, and has not been duplicated. In certain of the chapters matter will be found which is of too theoretical a character to meet the needs of the casual reader, and he is requested to pass it over charitably, remem bering that the prime object of this work is not to give rule of-thumb directions, but rather to aid in inculcating such general principles as shall aid in making the student as independent as possible of them, and at the same time fur nish a foundation upon which to base his future study of the various relations of fertilizers and manures to soils and crops. 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 Soils and Soil Fertility The aim of this book has been to give an outline of the principles of soil fertility in a form adapted for use in agricultural courses as given in High and other Secondary schools. While it is assumed that students using the book will have had, or will take at the same time, a course in botany, a brief statement of the essential requirements for plant growth is made in Chapter I, to serve as a starting point in the study of the soil. An effort has been made to make the book practical and give much information which can be immediately applied in farming, but a greater effort has been made to explain clearly the principles underlying farm practice so far as it applies to the management of the soil. It is distinctly recognized that knowledge of these principles is far from complete and that there are differences of opinion on some phases of the subject, but we have tried to give only those conclusions which are well supported by fact and accepted by the majority of authorities on the subject. It is hoped that the laboratory exercises can be given as outlined and that field excursions and practical illustrations may be used to establish the principles discussed in the class room. 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 Soils and Fertilizers, for Public Schools: A Discussion Upon the Nature and Treatment of Soils and the Value of Fertilizers There has been much ob eet'ion to the teaching of Agriculture in our District Schools, because teachers claim they do not have time to take up an additional subject, when they have so many subjects that are already required, and which must be taught. However, in recent years Agriculture has been coming into its own, and is being taught more and more in the schools. Teachers have begun to realize that any subject which holds the interest and attention of the pupils is worthwhile, and that any sub ect which does not hold their attention is not worthy of a place in our already crowded School course. In order to make Agriculture interesting to the pupil, we must base the work upon real practical problems which he can understand and appreciate. To do this is no small task, and it is a thing which demands a great deal of perseverance and initiative, on the part of teachers In such schools. The more ideas which an author attempts to incorporate into a text book, the more complex his text becomes, and the more difficult it is to follow. Therefore, in this text book we have taken' only a few of the most important conditions and have tried to incorporate them in such a manner that they can be used by the average district or graded school. We have tried further to make the book correct - theoretically and practically. The entire text has been written for boys and girls of the country schools, with these two things in mind, and the success which attends its use presupposes a proper presentation of many minor details, which it would be impossible to include under this cover. Many teachers get the idea that the sub ect of Agriculture as taught in our public schools is a Vocational Sub ect. This is' a mistaken idea, and the teachers should above all bear in mind that we are not making better farmers so much as we are making better men and women who are farmers. Naturally the teaching of Agriculture will make better farmers, and will serve to keep more of our boys on the farm. 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.
This vintage book contains extensive information on fertilisers, exploring their various ingredients, how they are used, what they do, and much more. A veritable encyclopaedia on the subject, “Handbook of Fertilizers” contains much information that will be of use to the modern farmer or gardener, and it would make for a fine addition to collections of related literature. Contents include: “Requirements For Plant Growth”, “Nitrogeneous Fertilizer Materials”, “Phosphatic Fertilizer Materials”, “Potash Fertilizer Materials”, “Effects Of Fertilizers On”, “Crops And Soils”, “Factory-Mixed Fertilizers”, “Home-Mixing Of Fertilizers”, “Purchase And Use Of Fertilizers”, etc. Many vintage books such as this are increasingly scarce and expensive. It is with this in mind that we are republishing this volume now in an affordable, modern, high-quality edition complete with a specially-commissioned new introduction on soil science.
Excerpt from Manures and Fertilizers: Their Nature, Functions and Application Before entering upon the discussion of the subject matter proper it will be well to, briefly emphasize the importance of increasing or at least maintaining soil fertility, if farming is to be made profitable. Continuous cropping, even on soils of the finest quality, without a concomitant return of plant food and the return of humus-forming material must result in soil impoverishment and decreased crop yields. 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.
Agriculture builds upon the integration of crops and the environment, with which its yield depends strongly on a healthy soil foundation. With that in mind, the knowledge of the soil and fertilizer is crucial to maintaining an environment with optimal nutrients, water and oxygen for crop production. Soil is one of human's precious resources, the protection and nurturing of our soil is thus an integral part of sustainable development. Effective soil management is considered not only a technology, but also an art. In practice, to make use the full potential of the land, the management strategies need to take account of the differences and characteristics of the soil, plant and climate that are unique to each geographical location. Such an approach is increasingly more important nowadays because of the increasing loss of cultivable land and need of high quality agricultural products.