37. Group of Soil Series No.37

This group of soils is well-drained, moderately deep coarse-textured that developed from weathered rocks in dry areas. They are low fertility. Soil reaction is strong acid. Soils in this group are Bo Thai (Bo), Naku (Nu) and Tab Salao (Tas) series.                Upland crops i.e. maize, sorghum, mungbean and watermelo are commonly found and yield is relatively low.

Problems : Low fertility, lack of water in dry season and soil erosion on steep slope.

Management for upland crops or vegetables : Upland crops or vegetables will grow better in leveling ground. Soils need to be improved with 2-3 ton/rai compose fertilizer or animal manure or mixed green manure (broadcast 8-10 kg/rai sword bean , 6-8 kg/rai cow pea or 4-6 kg/rai Crotalaria juncia) with soils before flowering and leave for 1-2 weeks. Chemical or liquid LDD fertilizer will also be applied according to recommendation . Plants should be grown on the contour or strip cropping with mulching. Soil should be conserved by vetiver around the areas. Farm ponds are recommended to preserve water to be used in dry season

Management for orchard : Soil preparation in 50*50*50 pit is to mix 20-35 kg compose fertilizer or animal manure. Conserve the soils by cover crops, mulching, and contour or fencing the tree with vetiver. Application of compose fertilizer or animal manure with chemical or liquid LDD fertilizer at vegetative growth, before and after harvesting. Farm ponds are recommended to preserve water to be used in dry season.