Excerpt from Journal of the Washington Academy of Sciences, 1916, Vol. 6 A study of the results for each soil obtained by the use of the various indicators and by the electrometric method shows that the agreement between the two indicators is very good except in one instance (n o. And that the agreement between the colorimetric and the electro metric methods is good in every case. Such agreements show that the two methods give comparable results and give ground for inferring that such results are approximately correct. It would seem premature at this time to apply the results obtained in this way to the soil as it exists in the field, since carbon dioxide is lost during the drying and the natural soil solution is diluted for the determinations. Nevertheless it may well happen that the errors so introduced (from a field standpoint) are not great enough to obscure the differences observable between different soils. Further work will be required to ascertain whether this is the case. 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.