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High and steep cutting should be executed for the construction of highways, quarry pits, residential
areas? _etc., in mountain region or hill district. Man-made high and steep slope should satisfy not only the stability
co d1t1ons b t also environmental d scenic conditions. In order to fulfill these conditions at the said slope which is
mamly constituted of rocks, a certam volume of soil mass which can foster trees and grasses should cover the slope
surface at stable state. In general, man-made steep slopes should be protected by various devices such as anchors slide prevention piles, etc., from the object of stability insurance. In addition to these devices, the author must insis
on the preparation of soil mass of a certain volume on the above-stated slope, in order to secure vegetal cover,
especially tree planting which is very important task for responding to the fundamental conditions.