Page 29 - World Reference Base for Soil Resources of Thailand

Land Development Department Library

Soil classification

WRB: Gleyic Acrisols
Soil taxonomy: Fine-loamy, mixed, isohyperthermic Plinthaquic Paleustults

Soil series: Buntharik series (Bt)

Profile description

 0-15 cm. (A) Grayish brown (10YR 5/2) loamy
sand; weak fine granular and weak fine

subangular blocky structures; friable,
nonsticky, nonplastic; common fine tubular
pores and many fine interstitial pores;
common fine roots; strongly acid (field pH 5.5);
abrupt, smooth boundary.

 15-24 cm. (BA) Very pale brown (10YR 7/3)
loamy sand; weak fine and medium subangular
blocky structures; friable, nonsticky, nonplastic;
bleached sand grains; common fine roots;
common fine tubular and interstitial pores;

strongly acid (field pH 5.5); clear, smooth
boundary.
 24-35 cm. (Bw1) Light gray (10YR 7/2) sandy
loam; weak fine and medium subangular

blocky structures; slightly firm, nonsticky,
nonplastic; many fine interstitial pores and
common fine tubular pores; few fine roots;
some dark spots of humus accumulation;
more compact than previous horizon; strongly
acid (field pH 5.5); clear, wavy boundary.

 35-47/63 cm. (Bw2) Very pale brown (10YR 7/3) light sandy clay loam; few fine and medium
distinct strong brown (7.5YR 5/8) and common medium prominent red (2.5YR 4/6) mottles;
moderate medium and coarse subangular blocky structures; firm, slightly sticky, slightly plastic;
few fine roots; common fine interstitial pores; very strongly acid (field pH 5.0); clear, irregular

boundary.

 47/63-110+ cm. (Bt) Light brownish gray (10YR 6/2) sandy clay loam; many medium and coarse
red (2.5YR 4/6) mottles; moderate medium and coarse subangular blocky structures; firm,
slightly sticky, slightly plastic; few fine roots; broken moderately thick clay coating on ped
faces; common fine and medium interstitial pores; very strongly acid (field pH 5.0).

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