24. Group of Soil Series No.24

This group of soils is moderately well drained and coarse-textured that occupy on slightly undulating terrained coastal plain, alluvial terrace and wash surface. They are very low fertility. Land uses commonly vary as location and farmers’ need. Some areas are bunded for paddy rice and sugarcane or cassava. However, yields are relatively low. Soils in this group are Ban Bung (Bbg), Ta Utain (Tu) and Ubon (Ub) series.

Problems : Thick sandy and silty layer soils induce lack of water, water logging in rainy season in some places.

Management for rice : Mix crop residue into moist soils and leave for 3-4 weeks. If managing by green manure, it should be the mixture of 6-8 Kg/rai of 50-70 days Sesbinia rostrata or S. speciosa then leave with 16-16-8 chemical fertilizer or LDD liquid organic fertilizer after 1-2 weeks. Farm ponds are recommended to preserve water to be used in dry season or second rice crop. If vegetables or legume will be planted, furrows would be constructed with application of 3-4 ton/rai compose fertilizer or animal manure with chemical or liquid LDD fertilizer.

Management for vegetable or orchard : Raised bed to 6-8 meters wide with 1.0-1.5 meters drainage canal. Raised bed around the beds then apply 3-4 ton/rai compose fertilizer or animal manure with chemical fertilizer or LDD liquid organic fertilizer. Apply 25-50 kg of compose fertilizer or animal manure into 75*75*75 meters pit to grow orchard. Apply compose fertilizer or animal manure with chemical fertilizer or LDD liquid organic fertilizer at vegetative growth, before and after harvesting. Farm ponds and water management are recommended to preserve water to be used in dry season.