Page 99 - E-BOOK English

Soil classification

WRB: Calcic Kastanozems
Soil taxonomy: Loamy-skeletal, carbonatic, semiactive, isohyperthermic Entic Haplustolls

Soil series: Takhli series (Tk)

Profile description

 0-21 cm (Ap) Very dark grayish brown
(10YR 3/2) clay loam; weak coarse and
medium subangular blocky parting to fine
granular structures; friable, sticky and plastic;

common medium and fine roots; few marl
fragments about 5% (0.3-1 cm in diameter);

moderately alkaline (field pH 8.0); clear,
smooth boundary.

 21-40 cm (Bw) Dark brown to brown
(7.5YR 4/2) clay loam; weak coarse and

medium subangular blocky structures; friable,
sticky and plastic; few fine and very fine
roots; gravels composed of marl about

10-15% (0.3-1 cm in diameter); moderately
alkaline (field pH 8.0); clear, smooth boundary.

 40-87 cm (Ck1) Dark brown to brown

(7.5YR 4-5/2) very gravelly clay loam;
weak fine and medium subangular blocky
structures; friable, sticky and slightly plastic;

few fine and very fine roots; gravels
composed of marl about 50-60% (0.3-1 cm in diameter), one animal hole (2-3 cm);
moderately alkaline (field pH 8.0); gradual, smooth boundary.

 87-119 cm (Ck2) Brown (7.5YR 5/2-4) extremely gravelly clay loam; structureless; few fine
and very fine roots; one animal hole (12-15 cm in diameter), gravels composed of marl about

70-80% (0.5-2 cm in diameter); moderately alkaline (field pH 8.0); gradual, smooth
boundary.

 119-220 cm (Ck3) Brown (7.5YR 5/2-4) extremely gravelly clay loam; structureless; same as
the upper horizon but no root in this horizon.

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