Page 63 - E-BOOK English

Soil classification

WRB: Rhodic Ferralsols
Soil taxonomy: Very-fine, kaolinitic, isohyperthermic Rhodic Kandiustox

Soil series: Pak Chong series (Pc)

Profile description

 0-12 cm (Ap) Dark reddish brown (2.5YR 3/4)
silty clay dark red (2.5YR 3/6) dry; moderate

fine subangular blocky breaking to granular
structures; slightly hard, friable, sticky, plastic;

many fine roots; slightly acid (field pH 6.5);
clear, smooth boundary.

 12-53 cm (Bt1) Dusky red (10R 3/4) clay dark
red (2.5YR 3/6) dry; moderate medium suban-
gular blocky structures; hard, friable, sticky,

plastic; broken moderately thick cutans on ped
faces; common fine roots: very strongly acid

(field pH 4.5); diffuse, smooth boundary.

 53-137 cm (Bt2) Dusky red (10R 3/4) clay dark

red (2.5YR 3/6) dry; moderate medium suban-
gular blocky structures; hard, friable, sticky,

plastic; patchy moderately thick cutans on ped
faces; common fine roots; very strongly acid

(field pH 4.5); diffuse, smooth boundary.

 137-200 cm (Bt3) Dark red (10R 3/6) clay; weak
fine subangular blocky structures; friable, sticky,

plastic; patchy thin cutans on ped faces; few
fine roots; very strongly acid (field pH 4.5).

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