Page 84 - E-BOOK English

Soil classification

WRB: Eutric Gleysols
Soil taxonomy: Fine-very fine, mixed, nonacid, semiactive Vertic Endoaquepts

Soil series: Chachoengsao series (Cc)

Profile description

 0-22 cm (Apg) Dark gray to very dark gray
(10YR 3-4/1) clay; many fine prominent

yellowish red (5YR 5/8) mottles along root
channels; weak coarse blocky to massive;
firm, very sticky, very plastic; many fine
roots; strongly acid (field pH 5.5); clear,

smooth boundary.

 22-42 cm (Bg) Dark gray (10YR 4/1) clay;
many fine distinct strong brown (7.5YR 5/8)
and few fine prominent yellowish red (5YR 5/8)
mottles; massive; very sticky, very plastic;

common fine roots; patchy organic matter
coatings along cracks; strongly acid (field pH
5.5); gradual, smooth boundary.

 42-70 cm (Bssg) Grayish brown to brown
(10-7.5YR 5/2) clay; many medium distinct
strong brown (7.5YR 5/8), yellowish red

(5YR 5/8) and few fine prominent red (10R 4/8)
mottles; massive; very sticky, very plastic; few
fine roots; patchy organic matter coatings

along cracks, root channels and animal holes;
distinct slickensides; neutral (field pH 7.0); clear, irregular boundary.

 70-125 cm (BCg) Grayish brown (10YR 5/2) clay; many medium distinct strong brown (7.5YR 5/8) and
prominent yellowish red (5YR 5/8) mottles, few spots of jarosite (10YR 8/8); massive; very sticky, very
plastic; few decayed large roots (in places); patchy organic matter coatings along decayed root channels;

neutral (field pH 7.0); abrupt, irregular boundary.

 125-165 cm (Cg1) Gray to dark gray (5Y 4-5/1) half ripe clay; few decayed roots in places;
moderately alkaline (field pH 8.0).

 165-200 cm (Cg2) Dark greenish gray (5GY 4/1) unripe silty clay loam; few decayed roots
(in places); common fine shell fragments; moderately alkaline (field pH 8.0).

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