Discrimination of soil phases by dual energy x-ray tomography

H. Rogasik, J. W. Crawford, O. Wendroth, I. M. Young, M. Joschko, K. Ritz

Research output: Contribution to journalArticlepeer-review

72 Scopus citations


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.
Original languageEnglish (US)
Pages (from-to)741-751
Number of pages11
JournalSoil Science Society of America Journal
Issue number4
StatePublished - Jan 1 1999
Externally publishedYes

Bibliographical note

Generated from Scopus record by KAUST IRTS on 2023-02-15

ASJC Scopus subject areas

  • Soil Science


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