Miscellaneous Circular
Author | : United States. Department of Agriculture |
Publisher | : |
Total Pages | : 100 |
Release | : 1927 |
Genre | : Agriculture |
ISBN | : |
Download The Relations Between Crop Yields And Precipitation In The Great Plains Area full books in PDF, epub, and Kindle. Read online free The Relations Between Crop Yields And Precipitation In The Great Plains Area ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Author | : United States. Department of Agriculture |
Publisher | : |
Total Pages | : 100 |
Release | : 1927 |
Genre | : Agriculture |
ISBN | : |
Author | : Ellery Channing Chilcott |
Publisher | : |
Total Pages | : 94 |
Release | : 1927 |
Genre | : Agriculture |
ISBN | : |
Author | : Ellery Channing Chilcott |
Publisher | : |
Total Pages | : 0 |
Release | : 1927 |
Genre | : Agriculture |
ISBN | : |
Author | : Ellery Channing Chilcott |
Publisher | : |
Total Pages | : |
Release | : 1931 |
Genre | : Agriculture |
ISBN | : |
Author | : Ellery Channing Chilcott |
Publisher | : Forgotten Books |
Total Pages | : 172 |
Release | : 2018-09-07 |
Genre | : Business & Economics |
ISBN | : 9781391994123 |
Excerpt from The Relations Between Crop Yields and Precipitation in the Great Plains Area, Vol. 1: Crop Rotations and Tillage Methods The cost of the maintenance of a practical summer fallow is one-half the acre cost of producing a crop of wheat, oats, Or corn. These relative values are therefore used in the following comparisons of crop rotations. As an example of one method of studying the theory and practice of crop rotation and tillage371 methods based upon these investigations covering 228 crop years, the continuous-cropping series, the aitel nate-fallow series, and rotations 1 to 9, inclusive, have been selected. They include 33 crops and 6 fallows each year at each of 16 field stations for an average period of 14% years, a total of plots. The rotations are simple 3-year rotations, and they are so arranged as to facilitate the comparison of different crop sequences and tillage methods. 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 | : Ellery Channing Chilcott |
Publisher | : Forgotten Books |
Total Pages | : 100 |
Release | : 2018-08-10 |
Genre | : |
ISBN | : 9781390347937 |
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.
Author | : Ellery Channing Chilcott |
Publisher | : |
Total Pages | : 164 |
Release | : 1931 |
Genre | : Crop rotation |
ISBN | : |
Author | : Ellery Channing Chilcott |
Publisher | : |
Total Pages | : 168 |
Release | : 1931 |
Genre | : Agriculture |
ISBN | : |