1 Sentences With "highest permissible level"

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Parameters of a horizontal drainage system Parameters of a vertical drainage system Land drainage for soil salinity control is usually by horizontal drainage system (figure left), but vertical systems (figure right) are also employed. The drainage system designed to evacuate salty water also lowers the water table. To reduce the cost of the system, the lowering must be reduced to a minimum. The highest permissible level of the water table (or the shallowest permissible depth) depends on the irrigation and agricultural practices and kind of crops.

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