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Excerpt from The Water-Relation Between Plant and Soil Roles of the soil in limiting plant activities. Plant World 12: 49 - 53. 1909. The relation of the osmotic pressure of the cell sap in plants to arid habitats. Plant World 14: 153 - 64. 1911. Present problems of physiological plant ecology. Amer. Nat. 43: 369 - 77. 1909. [the essentials of this paper appeared also, with same title, in Plant World 12: 41 - 6. Present problems in soil physics as related to plant activities. Amer. Nat. 46: 294-301. 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.