Determination of Soil Moisture by Neutron Scattering ... PDF Download

Author: Wilford R. Gardner
Publisher:
ISBN:
Category : Neutrons
Languages : en
Pages : 62

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Author: Donald Jenks Belcher
Publisher:
ISBN:
Category : Gamma rays
Languages : en
Pages : 28

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Author: Edward Exum Hood (Jr)
Publisher:
ISBN:
Category :
Languages : en
Pages : 50

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Author: Elmer Parker Yates
Publisher:
ISBN:
Category : Neutrons
Languages : en
Pages : 90

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Author: Robert L. Uhler
Publisher:
ISBN:
Category :
Languages : en
Pages : 118

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At the present time there is a recognized need for a better means of measuring soil moisture in situ. Soil moisture measurements are required in fundamental studies of soil moisture flow and soil-plant-water relationships as well as in practical studies in irrigation practices. Various phases of engineering also utilize soil moisture data, for example, soil moisture determinations are made during the construction of earth dams, road cuts and fills, and under airfield runways. The desired method should be quick, reliable, and adaptable over the moisture range from oven dryness to saturation. Research in nuclear physics has revealed the neutron scattering phenomena which may be utilized as a means of determining soil moisture. It is known that hydrogen nuclei have a large influence on the scattering of neutrons and that most of the hydrogen nuclei in soils occur primarily in water. Using this information it should be possible to correlate the scattering of neutrons in the soil with moisture content. Measurement of soil water in this would be independent of its physical or chemical state in the soil. This would eliminate variables that are inherent in the present methods, such as temperature, soil texture, and salt concentrations. The object of this study is to adapt the neutron scattering phenomena to a method of soil moisture determination in situ. The problem is one of instrumentation and calibration. The emphasis will be toward developing an instrument to be used for soil moisture determination in experimental plots. Other diverse applications will also be considered. The prerequisites of the method require that it be more accurate and precise than the present methods without increasing the time and costs involved.

Author: United States Department Of Agriculture
Publisher: Forgotten Books
ISBN: 9780366759354
Category : Technology & Engineering
Languages : en
Pages : 50

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Excerpt from Handbook on Measurement of Soil Moisture by the Neutron Scattering Method: A Compilation of Available Information for Use Within U. S. Forest Service Sampling destroys the site, injures vegetation, and inter feres with natural soil moisture dynamics. 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: United States. Forest Service
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

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Author: United States Dept. of Agriculture. Forest Service
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

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Author:
Publisher:
ISBN:
Category : Neutrons
Languages : en
Pages : 34

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Author: United States. Forest Service
Publisher:
ISBN:
Category :
Languages : en
Pages :

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