Page 45 - E-BOOK English

Soil classification

WRB: Gleyic Arenosols
Soil taxonomy: isohyperthermic, coated Oxyaquic Quartzipsamments

Soil series: Ban Buang series (Bbg)

Profile description

 0-20 cm (Ap) Grayish brown (10YR 5/2)
loamy medium sand; weak coarse
subangular blocky structures breaking
to single grains; friable, nonsticky and
nonplastic; many fine interstitial pores, few
fine and medium tubular pores; common
fine roots; moderately alkaline (field pH 8.0);
clear, smooth boundary.

 20-42 cm (C1) Very pale brown (10YR 7/3)
loamy coarse sand; common coarse distinct
brown to dark brown (10YR 4/3) mottles;
massive; slightly firm, nonsticky and
nonplastic; many fine interstitial pores,
few fine and medium tubular pores; more
compact than above horizon; few fine roots;
moderately alkaline (field pH 8.0); gradual,
smooth boundary.

 42-95 cm (C2) Very pale brown (10YR 7/3)
loamy coarse sand; many coarse distinct
brown to dark brown (10YR 4/3) mottles;
very weak coarse subangular blocky structure
breaking to single grains; friable, nonsticky
and nonplastic; many fine and medium interstitial pores, common fine tubular pores;
moderately alkaline (field pH 8.0); gradual, smooth boundary.

 95-130 cm (C3) Light brown (7.5YR 6/4) loamy coarse sand; many medium and coarse distinct
strong brown (7.5YR 5/6) mottles; very weak coarse subangular blocky structures breaking to
single grains; friable, nonsticky and nonplastic; many fine and medium interstitial pores,
few fine tubular pores; few hard iron nodules; moderately alkaline (field pH 8.0); gradual,
smooth boundary.

 130-150 cm (Cg) Pinkish gray (5-7.5YR 7/2) loamy coarse sand; common medium and coarse
distinct brownish yellow (10YR 6/6) and few coarse distinct strong brown (7.5YR 5/6) mottles;
weak coarse subangular blocky structures breaking to single grains; firm, nonsticky and
nonplastic; many fine and medium interstitial pores, few fine tubular pores; common
slightly hard iron nodules; moderately alkaline (field pH 8.0).

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