埴質土壌の改良に関する基礎的研究

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  • A fundamental study for the improvement of clay soil.
  • ショクシツ ドジョウ ノ カイリョウ ニ カンスル キソテキ ケンキュウ

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It was found that the compacted clay soil layer prevented root development of the camphor trees planted on the median strip of Chu-oh Dori in Takamatsu City, Kagawa. Before, in this case the compacted clay soil were removed and suitable quality soil for root development were carried in. However, it is now required that the soil improvement should be done by using the soil on site. So, a foundamental study for the improvement of the soil on site was carried out. As a result, it was found that it was possible to improve the compacted clay soil by mixing obsidian perlite and peat moss into the soil at a ratio of 10-20 volume percent. It is necessary to taken care not to mix soil and soil improvement materials when soil contains much water. To prevent trampling pressure is also needed.

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