Page 26 - E-BOOK English

The representatives of Acrisols in Thailand

Gleyic Haplic Acrisols

Gleyic Haplic Acrisols have gleyic properties,

a layer of ≥ 25 cm thick and start at the depth of
≤40 cm from the mineral surface. Besides, these

soils have reducing conditions in some parts of every
sublayer.

Buntharik series (Bt) is a representative of
Gleyic Haplic Acrisols. Buntharik soils are formed
from a washed deposit of sandstone and occur

on coalescing colluvial and alluvial fans. Relief is

flat to undulating which slopes range from 0-5
percent. Drainage is moderately well in topsoil
and poor in the subsoil. They are deep soils and

are characterized by a very dark grayish brown or

grayish-brown loamy sand or sandy loam A horizon
overlying a light gray or very pale brown loamy sand
or sandy loam, which in turn overlies a light brownish

gray or very pale brown sandy clay loam or sandy

clay with common to many prominent red mottles
in argillic B horizons. Scattered weathering sandstone
fragments occur at some depth below 100 cm from

the surface soil. Soil pH is very strongly acid to

moderately acid (pH 4.5-6.0). These soils have low
fertility that should be improved by applications of
chemical fertilizers, manure, organic fertilizers. Besides,

farm pond is needed for agricultural water supply.

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