Using Time Domain Reflectometry to Measure Frost Depth and Unfrozen Water Content in Soil PDF Download
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Author: David J. Mulla
Publisher:
ISBN:
Category : Runoff
Languages : en
Pages : 178
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Book Description
Author: David J. Mulla
Publisher:
ISBN:
Category : Runoff
Languages : en
Pages : 178
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Book Description
Author: M. W. Smith
Publisher:
ISBN:
Category :
Languages : en
Pages : 2
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Book Description
Describes method for measuring the unfrozen water content in frozen in situ soil samples.
Author:
Publisher:
ISBN:
Category : Agricultural conservation
Languages : en
Pages : 364
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Book Description
Author: D. E. Patterson
Publisher:
ISBN:
Category :
Languages : en
Pages : 14
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Book Description
A portable, nondestructive method for measuring the unfrozen water content of frozen soils using time domain reflectometry (TDR) to measure the dielectric property.
Author: CH. Benson
Publisher:
ISBN:
Category : Dielectric constant
Languages : en
Pages : 18
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Book Description
This paper reviews the three common methods used to remotely measure frost depth: (1) soil temperature measurements, (2) soil electrical resistivity measurements, and (3) soil dielectric constant measurements. Soil temperature measurements are often made using thermocouples or thermistors. Specially designed probes are used to measure frost depth based on electrical resistivity. Inferences based on dielectric constant are usually made using time domain reflectometry. Frost depths based on soil temperatures are made equally well using thermistors or thermocouples. However, frost depths inferred from soil temperature measurements can be erroneous if the freezing point is depressed (due to unsaturated conditions or the presence of salts) or if the temperature profile is essentially isothermal and near 0°C. More reliable measurements of frost depth are made using electrical resistivity or dielectric constant measurements because the electrical properties of soil are affected more by phase change of the pore water than temperature.
Author: W. Allen Marr
Publisher: ASTM International
ISBN: 0803124937
Category : Automatic test equipment
Languages : en
Pages : 326
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Book Description
Author:
Publisher: Academic Press
ISBN: 0323850766
Category : Technology & Engineering
Languages : en
Pages : 272
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Book Description
Advances in Agronomy, Volume 168, the latest release in this leading reference on agronomy, contains a variety of updates and highlights new advances in the field. Each chapter is written by an international board of authors. - Includes numerous, timely, state-of-the-art reviews on the latest advancements in agronomy - Features distinguished, well-recognized authors from around the world - Builds upon this venerable and iconic review series - Covers the extensive variety and breadth of subject matter in the crop and soil sciences
Author:
Publisher:
ISBN:
Category : Frozen ground
Languages : en
Pages : 348
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Book Description
Author: Daniel Edward Patterson
Publisher:
ISBN:
Category : Soil freezing
Languages : en
Pages : 138
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Book Description
Author: Michael W. Smith
Publisher:
ISBN:
Category :
Languages : en
Pages : 37
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Book Description
Examines the use of electromagnetic methods for measuring the unfrozen water content of freezing soils.
