Page 113 - E-BOOK English

Gleyic Luvisols

Gleyic Luvisols have gleyic properties strong brown and yellowish brown coatings along
throughout and reducing conditions in some root channels in the A horizon and common

parts of every sublayer, that has a layer ≥ 25 strong brown, yellowish brown, dark yellowish
cm thick, and starting ≤ 75 cm from the mineral brown mottles in the B horizon. Scattered

surface soil. iron/manganese nodules occur in the subsoil.

Nakhon Pathom series (Np) is a Secondary lime nodules may also occur in the

representative of Gleyic Luvisols. Nakhon deeper B horizon below approximately 80 cm
Pathom soils are formed from alluvium and from the soil surface. Land use limitation is 50

occur on alluvial plains or terraces. Relief is flat cm flooding depth over a period of 3-4 months
to nearly flat with a micro-relief caused by the per year. Due to lowland areas, poor drainage

presence of abundant termite mounds. Slopes conditions, and low water table levels, these
are about 0 to 2 percent. This soil is found areas are subjected to flooding where soils are

in the southwest of Central plain. Drainage is unsuitable for crop and orchard cultivation.
somewhat poorly drained to poorly drained.

Permeability and runoff are slow. They are very
deep and characterized by a very dark grayish

brown, dark grayish brown or dark brown A
horizon and a dark grayish brown B horizon, with

loam, silty clay loam or clay loam textures in
the A horizon and clay loam to clay in the B

horizon. These soils are mottled throughout with

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