Page 87 - E-BOOK English

Soil classification

WRB: Mollic Gleysols
Soil taxonomy: Fine, smectitic, isohyperthermic Vertic Endoaquolls

Soil series: Bang Len series (Bl)

Profile description

 0-13 cm (Apg1) Very dark gray (10YR 3/1) clay;
common fine distinct strong brown (7.5YR 5/6)
mottles along roots; strong medium and coarse
subangular blocky structures; extremely hard,
firm, very sticky, very plastic; common fine and
very fine roots; neutral (field pH 7.0); clear,
smooth boundary.
 13-30/38 cm (Apg2) Black (10YR 2/1) clay; few
fine prominent light olive brown (2.5Y 5/6)
mottles; moderate medium and coarse
prismatic breaking to medium and coarse
subangular blocky structures; extremely hard,
very firm, very sticky, very plastic; few fine and
very fine roots; common slickensides and
pressure faces; moderately alkaline (field pH
8.0); clear, wavy boundary.
 30/38-64 cm (Bssg1) Mixed very dark gray
(10YR 3/1) and grayish brown (10YR 5/2) clay; many
medium distinct light olive brown (2.5Y 5/6) and
few fine distinct yellowish brown (10YR 5/8)
mottles; weak coarse prismatic structures; firm,
very sticky, very plastic; many gypsum crystals,
many slickensides and pressure faces; moderately
alkaline (field pH 8.0); gradual, smooth boundary.

 64-116 cm (Bssg2) Light brownish gray (10YR 6/2) clay; many coarse distinct yellowish brown
(10YR 5/6-8) mottles; weak coarse prismatic structure; firm, very sticky, very plastic; many gypsum
crystals, many slickensides and pressure faces, common soft Fe&Mn concretions, organic clay coated
along crack faces; moderately alkaline (field pH8.0); gradual, smooth boundary.

 116-150 cm (Bg1) Light brownish gray (10YR 6/2) clay loam; many medium distinct yellowish brown
(10YR 5/8) mottles; weak medium subangular blocky structure; firm, sticky, plastic; silt coated on
crack faces, some iron pipes, common soft Fe&Mn concretions; moderately alkaline (field pH 8.0);
clear, smooth boundary.

 150-180 cm (Bg2) Light brownish gray (10YR 6/2) fine sandy clay loam to clay loam; many coarse distinct
yellowish brown (10YR 5/8) mottles; weak medium subangular blocky structure; firm, sticky, plastic; many
shell fragments, common soft Fe&Mn concretions; moderately alkaline (field pH 8.0); clear, smooth
boundary.
 180-200 cm (Cg) Greenish gray (5GY 5/1); clay; some glauconite and mica.

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