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Author: Society Of Agricultural Engineers Publisher: Forgotten Books ISBN: 9780666475848 Category : Technology & Engineering Languages : en Pages : 32
Book Description
Excerpt from Measuring Saturated Hydraulic Conductivity of Soils Unfortunately, the choice between methods is seldom black or white, and at the present state of technology there still is much disagreement between experts on the relative merits of many of the methods. Hence this compilation is not to be interpreted as a definitive evaluation, or even a tentative standard. Rather, it should be used as an introduction to the methods available and in common use, with some hints as to their pitfalls and limitations. The serious worker can then turn to the literature references for details on that method which most likely will suit sis needs. The project was initiated with G. O. Schwab as chairman. Cor respondence and personal contact with numerous persons, both mem bers and nonmembers of asae, have contributed to the material here presented.2. 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: Society Of Agricultural Engineers Publisher: Forgotten Books ISBN: 9780666475848 Category : Technology & Engineering Languages : en Pages : 32
Book Description
Excerpt from Measuring Saturated Hydraulic Conductivity of Soils Unfortunately, the choice between methods is seldom black or white, and at the present state of technology there still is much disagreement between experts on the relative merits of many of the methods. Hence this compilation is not to be interpreted as a definitive evaluation, or even a tentative standard. Rather, it should be used as an introduction to the methods available and in common use, with some hints as to their pitfalls and limitations. The serious worker can then turn to the literature references for details on that method which most likely will suit sis needs. The project was initiated with G. O. Schwab as chairman. Cor respondence and personal contact with numerous persons, both mem bers and nonmembers of asae, have contributed to the material here presented.2. 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: American Society of Agricultural Engineers. Soil and Water Division. DrainageResearch Committee Publisher: ISBN: Category : Drainage Languages : en Pages : 19
Author: American Society of Agricultural Engi Publisher: Hassell Street Press ISBN: 9781014208699 Category : Languages : en Pages : 32
Book Description
This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Author: Daniel Hillel Publisher: Elsevier ISBN: 0323152139 Category : Technology & Engineering Languages : en Pages : 400
Book Description
Applications of Soil Physics deals with the applications of soil physics and covers topics ranging from infiltration and surface runoff to groundwater drainage, evaporation from bare-surface soils, and uptake of soil moisture by plants. Water balance and energy balance in the field are also discussed, along with tillage and soil structure management. The development and extension of Penman's evaporation formula is also described. This book is comprised of 14 chapters and begins with a systematic description of the field-water cycle and its management, with emphasis on infiltration and runoff; redistribution and drainage; evaporation and transpiration; and irrigation and tillage. Subsequent chapters focus on transpiration from plant canopies; freezing phenomena in soils; scaling and similitude of soil-water phenomena; spatial variability of soil physical properties; and movement of solutes during infiltration into homogeneous soil. Concepts of soil-water availability to plants are considered, together with principles of irrigation management and the advantages and limitations of drip irrigation. This monograph is intended for upper-level undergraduate and graduate students of the environmental, engineering, and agronomic sciences.
Author: Adam Michael Karczynski Publisher: ISBN: Category : Languages : en Pages : 29
Book Description
Hydraulic conductivity of variably-saturated soils is critical to understanding processes at the land surface. Yet measuring it over an area comparable to the resolution of land-surface models is fraught because of its strong spatial and temporal variations, which render point measurements nearly useless. We derived unsaturated hydraulic conductivity at the horizontal scale of hectometers and the vertical scale of decimeters by analyzing trends in soil moisture measured using the cosmic-ray neutron method. The resulting effective hydraulic conductivity remains close to its value at saturation over approximately half of the saturation range and then plummets. It agrees with the aggregate of 36 point measurements near saturation, but becomes progressively higher at lower water contents; the difference is potentially reconcilable by upscaling of point measurements. This study shows the feasibility of the cosmic-ray method, highlights the importance of measurement scale, and provides a route toward better understanding of land-surface processes.
Author: Society Of Agricultural Engineers
Author: Society Of Agricultural Engineers
Author: American Society of Agricultural Engineers. Soil and Water Division. DrainageResearch Committee
Author: American Society of Agricultural Engineers. Drainage Research Committee
Author: American Society of Agricultural Engi
Author: Daniel Hillel
Author: Janneke J. Bouma
Author: C.A. BLACK
Author: Charles Allen Black
Author: 
Author: Adam Michael Karczynski