Physical Properties of Soil and Development of Effective Reclamation Method for Sloped Farm Field

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  • 傾斜化圃場の土壌物理性と効率的な造成方法の開発
  • ケイシャカ ホジョウ ノ ドジョウ ブツリセイ ト コウリツテキ ナ ゾウセイ ホウホウ ノ カイハツ

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Sloped farm field technology can provide rapid and effective surface drainage and surface irrigation for restored fields by sloping farm fields. However, there are concerns regarding the impact on farming due to cutting and banking during reclamation. There are also concerns about the growing burden on farmers who promote large-scale land use agriculture, considering that working hours are expected to increase due to reclamation involving soil conveyance. From the results of a survey on the influence exerted by cutting and banking depending on the soil physical properties, it has been found that the influence on three-phase distribution and soil hardness can be reduced by applying the surface soil of a certain thickness without creating any problems for farming. In addition, any subsidence by banking or reduction in level accuracy due to secular changes has not been found. By efficiently using a laser leveler, the number of working hours for the reclamation of a sloped farm field can be reduced to about that required for a conventional reclamation, and, as a result, cost reduction and labor-saving is achieved in sloped farm field technology.

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