Info Soil Chonburi
Soil Map Chonburi
Soil Land Use Chonburi
 
 


 
 
 
               Chonburi 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.
               Landform 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.  
   
Soil resources in Chonburi Province are as follows  
               1. 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.  
               2. 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 not satisfactory.  
               3. 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.  
               4. 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.  
               5. 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.