Abstract
Samples of the surface Andosols in the Kanto Loam Formation were extracted and the structural properties of macropores and drainability were examined.
Other properties which include pF-moisture distribution curve group, characteristics of organic matter content and macropore diameter were analyzed. The soil matrix of Andosols was observed using soft X-ray radiographs
The soil was found to contain many soild particles with high density and well-developed soil aggregates. The Andosol structure had a high difference between fine and coarse macropore and tortuosity of the water flow path was small.
The study has made it clear that macropores found in Andosols, regardless of bulk density or porosity become the main course of the saturated hydraulic conductivity. However, when the natural structure of Andosol is compacted, the saturated hydraulic conductivity declines explaining the reduction in the water path and increase in tortuosity.
With the above, discussion, it was confirmed that macropore of surface undisturbed Andosols in the Kanto Loam Formation contributed in the isotropic soil structure and soil drainability.
