Basic Studies on Soil Environment for Sound Growth of Street Trees.

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  • 街路樹のおかれている土壌環境
  • ガイロジュ ノ オカレテ イル ドジョウ カンキョウ

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The sound growth of street trees deeply depends on the soil environment on which they grow.<BR>In order to consider such problems as soil aeration and water permeability of the soil in tree pit, we looked into some physical properties: soil moisture, soil air, and soil compactness. The results of the investigation are as follows:<BR>1. The soil aeration in tree pit is always in poor condition for the sound growth of street trees.<BR>2. The water condition in tree pit is very artificial. There is a remarkable border on soil moisture between the soil dressing and the soil beneath of it.<BR>3. The surface soil in tree pit is stamped down under the foot-steps of pedestrians.<BR>All these matters cause damage to the root system growing in tree pit, and then, they should disturb the sound growth of street trees. So it is necessary to check on the soil environment in tree pit of street trees.

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