is an eastern province of Thailand. Neighboring provinces are Chachoengsao,
Chanthaburi, and Rayong. To the west is the Gulf of Thailand. The
area of province occupy about 4,363km2 and located in Savanna climate.
In general, the area about 64% is characterized by undulating terrain
especially in the east side of the province. Secondary, areas on the
north and coastal zone, about 25 % are nearly flat terrain. The remaining
area is mountain range about 11%, contact with Chachoengsao, Chanthaburi
and Rayong province and scattered cover all of the areas.
of Chonburiprovince consist of beach and dune formations, active tidal
flats of recent marine deposits, former tidal flats of older brackish
deposits, floodplains of recent alluvium, alluvial terraces and fans
of old alluvium and colluvium, dissected erosion surface occurring
over various rocks and hills and mountains.
in Chonburi Province are as follows
Potential soils for agriculture;the soil is deep with coarse-medium
textured. The drainage pattern of upland are considered to moderately
well drained-well drained and suitable for economic crop such as sugarcane,
cassava, pineapple, rubber, oil palm or fruit tree. While lowland
are somewhat poorly drained-poorly drained with ground water shallower
than 1 meter and suitable for paddy rice cultivation. Soil fertility
level of the areas are classified to low, therefore the productivity
is relatively low due to poor fertility and some area prone to erosion.
Acid sulfate soils;they occur in the upper part of the province
and recognize the sediments as being brackish water with high content
of sulphur. The acid sulfate soils are probably the most intensively
studied soils and the basic concepts of ripening and mineral-chemistry
changes, stems from these studies. This soil consists mainly of poorly
drained, fine-textured and dark soils that commonly occur on low-lying
terrain of brackish water deposits, former tidal flat. This soil group
is extremely acidic condition and has moderate fertility. Surface
cracks often occur in the dry season. Most land use consists of paddy
rice cultivation. However, without soil amelioration, the yield is
Saline soils;they occur in the tidal swamp areas over marine
sediments only a narrow coastal strip which is inundated daily by
sea water from a network of tidal channels and occupied by a mangrove
forest. The dominant characteristics of these soils are the clayey
subhorizons which commonly have an ‘n’ value ranging from 0.7 to 1.8
and high salinity.They are very poorly drained and clayey. Soil reaction
is commonly very alkaline, whereas areas contain appreciable amount
of sulfur in the form of pyrite, upon oxidation, they become very
acidic. Parts are used for aquaculture and salt farming.
Sandy soils;these soils are developed on the beach ridges
and slope wash. They are normally very deep sandy throughout the soil
profile and somewhat excessively drained. Due to very high sand content
in the profile, they are very low in fertility. They also have a low
water holding capacity, available moisture content and a rapid permeability.
Skeletal soils;skeletal soils refer to the soils that contain
35 % or more by volume of rock fragments, cobbles, gravel, and laterite
concretions or ironstones having diameter greater than 2 mm. within
the shallow depth (less than 50 cm.). These soils are found to occur
in number of landscape ranging from alluvial terraces, fans, erosional
surface and foothill slopes. It is common that these soils are shallow,
prone to erosion and low natural fertility status.