Soil in the south of Thailand are usually reddish or yellowish , highly erodible , with parent materials found at shallow levels , and with low fertility. these characteristics are largely attributed to the humid climate and result in their low agricultural.
In contrast the alluvial soils of the central flood plan region flood plain have a much higher agricultural potential , especially when irrigated.
Most soils in the north of the country are young and not highly developed. The steep terrains present challenges for land use , as there is a serious risk of soil erosion and loss of surface soil. Soils found in the plains have moderate to high agricultural potential.
Most soils in the northeast have relatively low potential for agriculture. This is due to the nature of the parent materials - predominantly sandstone or silt stone , which result in coarse - textured soils with low fertility. Their low water holding capacity present risks of moisture stress during the cropping season. Moreover there are other problem soils in connection with agricultural use , i.e saline / alkaline , sandy gravelly and lateritic soils.
