Download Free A First Report On The Relations Between Climates And Crops Book in PDF and EPUB Free Download. You can read online A First Report On The Relations Between Climates And Crops and write the review.

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Excerpt from A First Report on the Relations Between Climates and Crops The very extensive problem suggested by the title of this report involves, first, a general study of meteorology in its relations to vegetable and animal life; second, the determination of the effect of climate upon the growth and distribution of staple crops; third, the determination of the climatic conditions and the localities best suited to the growth of special varieties of plants and seeds; fourth, the statistics of the extent of the areas best adapted to each of the more important crops; fifth, the separate and the combined effects of tem perature, rainfall, and sunshine, both in their normal and abnormal proportions, upon the annual yields of the staple cr0ps. But such study necessitates great labor and much time, andas the first step in any such investigation consists in the critical examination of the work already done by others, in order to prevent unnecessary dupli cation and avoid the troubles that others have experienced, therefore the reader must consider this first report as only a brief introduction to our knowledge of the relations between climates and crops. Three ways are generally recognized as affording our only methods of advancing our knowledge of our subject, Viz, physiological, experi mental, and statistical. I shall therefore endeavor to present the question of climates and Crops from these three points of View. 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 work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1905 edition. Excerpt: ...more or less severe or more or less prolonged, and thus lower the average yearly temperature, without causing any marked difference in the epochs of vegetation. This reflection explains, independent of all hypothesis, that for any equable mean annual temperature the acceleration in vegetation should be in favor of localities where the annual variation is the greatest, particularly in northern countries, where the frost prevails during many months of the year and where duing many of the following months the sunlight never ceases to fill the sky. Admitting the hypothesis that the action is proportional to the sum of the squares of the temperatures, the results are still more positive; for, other things being equal, the greater the annual variation the greater will be the sum of the square of the positive ordinates in the curves of temperatures. I will now present some conclusions that one can deduce from all that precedes. I must first of all warn my readers that this work must be considered only as an attempt to solve a problem as difficult as it is interesting, the principal elements for the solution of which are still wanting. 1. A great number of factors combine to produce variations in the periodic phenomena of vegetation, the most important of which in our climate is temperature. 2. It may be estimated that the progress of vegetation is in proportion to the sum of the temperatures, or, better, to the sum of the squares of temperatures, calculated above the freezing point, starting with the epoch of the awakening of vegetation after the winter sleep. 3. The cold of winter, if it does not injure the vitality of the plant, does not cause any perceptible retardation in its future development, particularly if the ground has been covered...
Farming for Our Future examines the policies and legal reforms necessary to accelerate the adoption of practices that can make agriculture in the United States climate-neutral or better. These proven practices will also make our food system more resilient to the impacts of climate change. Agriculture's contribution to climate change is substantial--much more so than official figures suggest--and we will not be able to achieve our overall mitigation goals unless agricultural emissions sharply decline. Fortunately, farms and ranches can be a major part of the climate solution, while protecting biodiversity, strengthening rural communities, and improving the lives of the workers who cultivate our crops and rear our animals. The importance of agricultural climate solutions can not be underestimated; it is a critical element both in ensuring our food security and limiting climate change. This book provides essential solutions to address the greatest crises of our time.
This summary of what is known about microclimatic environments and the eff ects of climate on plant growth presents a comprehensive statement on the complex relationship between climate and agriculture. Th e author covers the theory and data of modern physical geography, meteorology, and agronomy within the context of contemporary ecological analysis to produce a book invaluable not only to the student and research worker but also one that deals for the fi rst time with the application of theory to real problems of energy budgets and water balance for the practical agronomist. Arranged according to the physical processes that aff ect the climate/plant relationship, the book is divided into two parts. The first part considers radiation fl ux in the free atmosphere and in the biosphere near the ground, the processes of photosynthesis and photoperiodism, and the effect of radiation and temperature on plant growth. The second part discusses in detail methods of determining or estimating both potential and actual evapotranspiration, the meteorological approach of computing water balance, and the eff ect of water on plant growth. The author's clear and logical presentation of material, emphasizing general principles rather than experimental and technical details, makes this book especially useful for students of agricultural climatology. The broad scope of the work and its comprehensive survey of the literature make it equally a valuable reference for professionals in physical geography, meteorology, agronomy, botany, plant physiology, soil science, and hydrology. Jen-Hu Chang is professor emeritus of geography and climatology at the University of Hawaii. He is a past member of the editorial board of the Annuals of the Association of American Geographers and is past secretary of the Hawaiian Geophysical Society. He is the author of Atmospheric Circulation Systems and Climates, Agricultural Geography of Taiwan, and Problems and Methods in Agricultural Climatology.