Page 32 - World Reference Base for Soil Resources of Thailand
P. 32

Land Development Department Library


            การจำาแนกดิน (Soil classification)


            WRB: Gleyic Acrisols
            Soil taxonomy: Fine-silty, mixed, subactive, isohyperthermic Typic Paleaquults

            Soil series: Hin Kong series (Hk)


            Profile description

             0-15/18 cm (Apg) Mixed white and light gray
                (10YR 8/1 and 10YR 7/2) silt loam; common fine
                and medium distinct brownish yellow (10YR 6/8)
                mottles; moderate weak fine and medium
                subangular blocky structures; slightly hard, friable,
                sticky, slightly plastic; common very fine and
                fine roots; moderately acid (field pH 6.0); clear,
                wavy boundary.

             15/18-28 cm (Bg) Mixed white and light gray
                (10YR 8/1 and 10YR 7/2) silt loam; many medium
                and coarse distinct brownish yellow (10YR 6/6-8)
                mottles; moderate medium and coarse subangular
                blocky structures; slightly hard, friable, sticky,
                plastic; common very fine and fine roots; strongly
                acid (field pH 5.5); clear, smooth boundary.

             28-44 cm (Btg1) Mixed white and pale brown
                (10YR 8/1 and 10YR 6/3) silt loam; many medium
                and coarse distinct brownish yellow (10YR 6/8),
                few fine distinct strong brown (7.5YR 4/6) mottles;
                strong medium and coarse subangular blocky structures; hard, friable, sticky, plastic; patchy
                moderately thick cutan on ped faces and in pores; few very fine roots; few to common soft
                black Fe&Mn concretions; very strongly acid (field pH 5.0); clear, smooth boundary.
             44-82/86 cm (Btg2) Grayish brown (10YR 5/2) silty clay loam; common medium distinct brownish
                yellow and yellowish brown (10YR 6/8 and 10YR 5/6) mottles; strong medium and coarse
                subangular blocky structures; very hard, firm, sticky, plastic; patchy moderately thick cutan on
                ped faces and in pores; common soft black Fe&Mn concretions; very strongly acid (field pH 5.0);
                clear, wavy boundary.
             82/86-140 cm (Btg3) Light brownish gray (10YR 6/2) silty clay loam; many medium and coarse
                distinct pale brown and yellowish brown (10YR 6/3 and 10YR 6/8) mottles; strong medium
                and coarse subangular blocky structures; very hard, firm, very sticky, very plastic; patchy
                moderately thick cutan on ped faces and in pores; some organic matter coated on ped
                faces; strongly acid (field pH 5.5); clear, smooth boundary.

             140-200 cm (Btg4) Grayish brown (10YR 5/2) silty clay loam; common fine and medium
                distinct yellowish brown (10YR 6/8) mottles; strong coarse subangular blocky structures;
                slightly hard, firm, very sticky, very plastic; patchy moderately thick cutan on ped faces and
                in pores; strongly acid (field pH 5.5).
                                                                                                      28
   27   28   29   30   31   32   33   34   35   36   37