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Eutric Gleysols

Eutric Gleysols have an effective base drained. They are very deep and characterized

saturation [exchangeable (Ca + Mg + K + Na) / by a dark coloured A horizon overlying a paler
Exchangeable (Ca + Mg + K + Na + Al); exchangeable coloured B horizon containing red mottles in

bases by 1 M NH OAc (pH 7), exchangeable the upper layers and brownish yellow and
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Al by 1 M KCl (unbuffered)] of ≥ 50%: in the yellowish brown mottles in the lower layers.

major part between 20 and 100 cm from the The B horizon overlies a reduced greenish gray
mineral surface soil. marine clay which is low in sulphur. Pressure

Chachoengsao series (Cc) is a faces and slickensides are characteristic of the

representative of Eutric Gleysols. Chachoengsao B horizon. Soil pH is strongly acid to moderately
soils are formed from marine sediments mixed with alkaline (pH 5.5-8.0). Land use limitation is

riverine alluvium under brackish water influence. 30-40 cm flooding depth over a period of 4-5
They occur in former tidal flats or alluvial months per year.

plain which grade down to marine deposits
and now free of tidal flooding which has been

in cultivation for some time. This soil is found
in the southeast of the Central plain. Relief is

flat. Slopes are about 0-1 %. Drainage is poorly

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