Pertaining to grayish, greenish, and bluish soil colors resulting from waterlogging and reduction of the soil material.
Soil type subject to waterlogging because of the high content of impermeable clays
soil material that has developed under anaerobic conditions as a result of prolonged saturation with water. Grey and sometimes blue or green colours predominate but mottles (yellow, red, brown and black) may be present and indicate localized areas of better aeration.
The grey or greenish-grey colouration found in soils. It is often produced under conditions of poor drainage, giving rise to chemical reduction of iron and other elements.
some layer of mineral soil developed under conditions of poor drainage (poor aeration), resulting in reduction of iron and other elements and in gray colors and mottles (blobs of variously colored soils).
A name of Russian origin referring to a soil which is particularly wet. These soils exhibit pale grey, or bluish or greenish grey colours where complete reduction prevails, or mottled pale grey and rusty brown colours where reduction and oxidation processes alternate as under conditions of a fluctuating water table; a soil may be said to be gleyed where any such conditions prevail.