| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
a Center for Agricultural Landscape and Land Use Research (ZALF), Eberswalder Str. 84, D-15374 Muencheberg, Germany
b Scottish Crop Research Institute, Unit of Integrative Bioscience, Invergowrie, Dundee, Scotland DD2 5DA, UK
hrogasik{at}zalf.de
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.
Abbreviations: CAT, computer assisted tomography • CT, computed tomography • DH, degree of heterogeneity • HU, Hounsfield unit • WMSD, weighted mean standard deviation
This article has been cited by other articles:
|
|
 |
|
  L. Luo, H. Lin, and P. Halleck Quantifying Soil Structure and Preferential Flow in Intact Soil Using X-ray Computed Tomography Soil Sci. Soc. Am. J., June 18, 2008; 72(4): 1058 - 1069. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 E. V. Vazquez, J. P. Ferreiro, J. G. V. Miranda, and A. P. Gonzalez Multifractal Analysis of Pore Size Distributions as Affected by Simulated Rainfall Vadose Zone J., May 27, 2008; 7(2): 500 - 511. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
G. M. Hettiarachchi, E. Lombi, M. J. McLaughlin, D. Chittleborough, and P. Self Density Changes around Phosphorus Granules and Fluid Bands in a Calcareous Soil Soil Sci. Soc. Am. J., April 19, 2006; 70(3): 960 - 966. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. Rachman, S. H. Anderson, and C. J. Gantzer Computed-Tomographic Measurement of Soil Macroporosity Parameters as Affected by Stiff-Stemmed Grass Hedges Soil Sci. Soc. Am. J., August 25, 2005; 69(5): 1609 - 1616. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
K. Wu, N. Nunan, J. W. Crawford, I. M. Young, and K. Ritz An Efficient Markov Chain Model for the Simulation of Heterogeneous Soil Structure Soil Sci. Soc. Am. J., March 1, 2004; 68(2): 346 - 351. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 H. Rogasik, I. Onasch, J. Brunotte, D. Jegou, and O. Wendroth Assessment of soil structure using X-ray computed tomography Geological Society, London, Special Publications, January 1, 2003; 215(1): 151 - 165. [Abstract] [PDF]
|
|
|
|
|
|
T. E. Ochsner, R. Horton, and T. Ren Simultaneous Water Content, Air-Filled Porosity, and Bulk Density Measurements with Thermo-Time Domain Reflectometry Soil Sci. Soc. Am. J., November 1, 2001; 65(6): 1618 - 1622. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
| The SCI Journals | Agronomy Journal | Crop Science | |||
| Journal of Natural Resources and Life Sciences Education |
Vadose Zone Journal | ||||
| Journal of Plant Registrations | Journal of Environmental Quality |
The Plant Genome | |||
