19. Group of soil Series No.19

This group of soils consists of somewhat poorly drained, and medium textured soils that occur mainly on low-lying terrain. However, this group of soils is characterized by coarse-textured at the surface and upper subsoil but the lower subsoil is relatively compacted and having slow permeability. Soil fertility is relative low. Soil reaction ranges from very strongly acid to strongly acid to strongly acid. Soils in this group are Ma Kham (Mak) and Wichien Buri (Wb).                 Most areas are cultivated to paddy rice. However , yield is relatively low due to pour fertility and lacks of water in dry season.

Problems : Hard pan within 100 cm. depth in sandy profile , low fertility, strong acid in some places, lack of water in dry season and water logging in rainy season.

Management for rice : Prepare and mix crop residue into moist soils and leave for 3-4 weeks. If managing by green manure, it should be the mixture of 4-6 Kg/rai of 50-70 days Sesbinia rostrata or S. speciosa and 16-16-8 chemical fertilizer or LDD liquid organic fertilizer in the soils and leave for 1-2 weeks.. Top dressing again 35-45 days after transplanting. Farm ponds are recommended to preserve water to be used in dry season or second rice crop or short season upland crops after first rice. If vegetables or legume will be planted, furrows would be constructed with application of 2-3 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. Apply 2-3 ton/rai compose fertilizer or animal manure with chemical fertilizer or LDD liquid organic fertilizer. Apply 20-35 kg of compose or animal manure into 50*50*50 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.