Appropriate Moisture Condition of Surface Soil during Large-sized Farmland Consolidation Work and Selection of Construction Equipment for Subsoil

KUWABARA Jun, OOTOMO Hidefumi, YOKOHAMA Mitsuhiro

doi:10.11408/jsidre.89.i_11

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Other Title

圃場の大区画化整備時の表土の適正な水分状態と下層土の施工機械の選定
ホジョウノダイクカクカセイビジノヒョウドノテキセイナスイブンジョウタイトカソウドノセコウキカイノセンテイ

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<p>In order to identify indicators for controlling the deterioration of soil physical properties during large-sized farmland consolidation work, this study examined the soil moisture condition during work and soil physical properties before and after work. The surface soil of the study plot was light or silty clay and the subsoil was low peat soil. Since the surface soil (0 to 15 cm deep) before consolidation work is the plowed soil layer and the surface soil (15 to 30 cm deep) is the plow pan layer, it was found that the indicators of the consolidation work start can be shown by the soil moisture condition during construction work that controlls the deterioration of the physical properties of the surface soil (0 to 15 cm deep). In order to control the deterioration of the physical properties of the surface soil (0 to 15 cm deep), it was found that consolidation work needed to be carried out when the soil was in a dry condition with a pF of 2.0-2.5 (-9.8∼-31 kPa). Surface soil (0 to 15 cm deep) with a pF of 2.0-2.5 (-9.8∼-31 kPa) has a bearing capacity of 0.58-0.69 MPa, which is considered to be one of the indicators that can be used to decide when to start consolidation work after rainfall.</p>

Journal

Transactions of The Japanese Society of Irrigation, Drainage and Rural Engineering

Transactions of The Japanese Society of Irrigation, Drainage and Rural Engineering 89 (1), I_11-I_18, 2021

The Japanese Society of Irrigation, Drainage and Rural Engineering

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