Page 117 - E-BOOK English

Soil classification

WRB: Haplic Luvisols
Soil taxonomy: Fine-silty, mixed, semiactive, isohyperthermic Typic Haplustalfs

Soil series: Kamphaeng Saen series (Ks)

Profile description

 0-10/14 cm (Ap1) Dark brown (10YR 3/3) silt loam;
moderate fine and some medium subangular blocky
structures; slightly hard, friable, nonsticky,
nonplastic; many fine and medium roots; common fine
mica flakes; few soft lime concretions; moderately
alkaline (field pH 8.0); clear, wavy boundary.
 10/14-34 cm (Ap2) Dark brown (10YR 3/3) silt loam;
moderate fine and medium subangular blocky
structures; slightly hard, friable, nonsticky, nonplastic;
many fine and common medium roots; many
fine mica flakes; few ant holes; few soft lime
concretions; few pieces of charcoals; few pieces of
decayed bulb of grasses; moderately alkaline (field
pH 8.0); clear, smooth boundary.

 34-49 cm (Bt1) Dark brown (10YR 3-4/3) silt loam;
moderate medium subangular blocky structure; hard,
friable, slightly sticky, nonplastic; patchy thin clay
coating in pores; common fine roots; many fine
mica flakes; few ant holes; few pieces of charcoals;
few brown spots of B material may be brought up
by biological activities; neutral (field pH 7.0);
gradual, smooth boundary.

 49-64 cm (Bt2) Dark brown to brown (10YR 4/3)
silt loam to silty clay loam; moderate medium subangular blocky structure; hard, friable, sticky and
slightly plastic; moderately thick clay coating in pores and patchy thin clay coatings on ped faces;
many fine roots; common fine mica flakes; few ant holes; slightly acid (field pH 6.5 ); clear, smooth
boundary.

 64-97/102 cm (Bt3) Dark brown to brown (7.5YR 4/4) silty clay loam; moderate fine and medium
subangular blocky structures; hard, friable, sticky, slightly plastic; moderately thick clay coating in
pores and patchy thin clay coatings on ped faces; common fine roots; many fine mica flakes; few
dark brown spots of A material may be brought down by biological activities; few ant holes; slightly
acid (field pH 6.5 ); gradual, wavy boundary.

 97/102-136 cm (Bt4) Brown (7.5YR 4-5/4) loam; weak fine and medium subangular blocky structures;
friable, slightly sticky, slightly plastic; patchy thin clay coatings in pores and on ped faces; common
fine roots; many fine mica flakes; common dark brown spots of A material may be brought down
by biological activities; few ant holes; neutral (field pH 7.0); gradual, smooth boundary.
 136-165+ cm (Bt5) Strong brown (7.5YR 5/6) silty clay loam; weak fine and medium subangular blocky
structures; friable, sticky, plastic; patchy thin clay coatings in pores and on ped faces; few fine roots;
many fine mica flakes; few dark brown spots of A material may be brought down by
biological activities; common medium and coarse secondary lime concretions; few ant holes; neutral
(field pH 7.0).
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