Excerpt from Flow and Retention of Water in Layered Soils Knowledge about the water-retention proper ties of the soil enables one to estimate the need for and the frequency of irrigation. Satisfactory methods are available or being developed (5) that can be used to predict the extraction rate of water from'the soil by growing plants. If one knows how much water is retained for plant use in the soil after irrigation and how fast it is ex tracted, the scheduling of irrigations with reason able accuracy is simple. Such factors as continued deep drainage after irrigation and level of with drawal before irrigation have to be considered. 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.