Discrimination of soil phases by dual energy x-ray tomography

Rogasik, H., Crawford, J.W. , Wendroth, O., Young, I.M., Joschko, M. and Ritz, K. (1999) Discrimination of soil phases by dual energy x-ray tomography. Soil Science Society of America Journal, 63(4), pp. 741-751. (doi: 10.2136/sssaj1999.634741x)

Abstract

Numerous soil ecological functions are influenced by soil structure through its impact on spatial and temporal distributions of soil particles, water, and air within the soil profile. The nondestructive technique of x‐ray computed tomography (CT) was used for studying soil structure. X‐ray attenuation determined for two energy levels (80 kV and 120 kV) was used to calculate distributions of water, air, and solids, as well as the voxel dry bulk density for two silt loam subsoils. The spatial resolution during scanning was 0.25 mm in the horizontal and 1 mm in the vertical direction. For different voxel sizes, the weighted mean of the derived volumetric water, air, and solid contents, and the dry bulk densities agreed with the sample's phase composition and dry bulk density obtained by weighing. The use of dual energy scanning to study the heterogeneity of soil structure and the spatial distribution of water, air, and solids is discussed.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Crawford, Professor John
• Authors: Rogasik, H., Crawford, J.W., Wendroth, O., Young, I.M., Joschko, M., and Ritz, K.
• College/School: College of Social Sciences > Adam Smith Business School > Management
• Journal Name: Soil Science Society of America Journal
• Publisher: Wiley for the Soil Science Society of America
• ISSN: 0361-5995
• ISSN (Online): 1435-0661
• Copyright Holders: Copyright © 1999 The Authors
• First Published: First published in Soil Science Society of America Journal 63(4):741-751
• Publisher Policy: Reproduced under a Creative Commons licence

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