The Relations Between Crop Yields And Precipitation In The Great Plains Area

Author : Ellery Channing Chilcott
Publisher : Forgotten Books
ISBN 13 : 9781390347937
Total Pages : 100 pages
Book Rating : 4.3/5 (479 download)

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Download or read book The Relations Between Crop Yields and Precipitation in the Great Plains Area (Classic Reprint) written by Ellery Channing Chilcott and published by Forgotten Books. This book was released on 2018-08-10 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Relations Between Crop Yields and Precipitation in the Great Plains Area To facilitate comparisons of these factors they are expressed diagrammatically, the perpendicular line representing the respective means and the horizontal lines the deviations from the means in percentages of the respective means. Deviations from the means are represented by extensions, to the right for those above the mean and to the left for those below. The relative lengths of these extensions are proportional to the per centages of deviation. If directly proportional rela tions existed between the crop yields and the precipita tions here represented, these extensions, if any, would be all in the same direction and to the same extent for any one year at any one station. That no such pro portional relations exist between either seasonal or annual precipitation and crop yields is obvious from an examination of these diagrams. Still more con elusive are the facts that the mean percentage devia tions for all of the 23 stations for the periods during which these investigations have been conducted, an aggregate of 303 years, are as follows: Seasonal precipitation, from 69 above to 49 below, a range of 118 per cent; annual precipitation from 49 above to 38 below, a range of 87 per cent. For crop yields the deviations are from 171 above to 99 below, a range of 270 per cent, which IS more than twice as great for crop yields as for seasonal precipitation and about three times as great as for annual precipitation. 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.