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Haplic Luvisols
Haplic Luvisols have a typical expres- runoff is slow to moderate. They are very deep
sion of certain features and only used if none and characterized by a brown or dark brown
of the preceding qualifiers applies. silt loam or loam A horizon, overlying a brown
Kamphaeng Saen series (Ks) is a or strong brown silt loam, silty clay loam or
representative of Haplic Luvisols. Kamphaeng loam argillic B horizon and sandy loam or loamy
Saen soils are formed from alluvium and sand texture may occur in the lower part of the
occur on coalescing fan or old levees and B horizon within 150 cm. Soil pH is neutral to
breach deposits of the terrace. Relief is flat to moderately alkaline (pH 7.0-8.0). All horizons
undulating. Slopes are 1-5 percent. contain abundant mica flakes. Intensive farming
These soils occupy large extent in the is used in most areas of this soil. However, a
southwestern part of the Central Plain. Drainage consistent water supply and fertility management
is well drained. Permeability is moderate and are required to obtain higher yield.
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