Properties of Soil on Hai Hau District, Namdinh Province

Based on analysis of soil samples Hai Hau soils can be classified into 3 groups with 9 soil types, alluvial soil being the lagest area with 8,976.61 ha, occupying 39.20% of the natural area, followed by saline soil group with 4,8725.16 ha, accounting for 21.28% of the natural area. Sandy soil has the smallest area with 422.89 ha, occupying 1.85% of the natural area. The physical and chemical properties of all soil types are suitable for many types of annual crops. Soils have a good structure with soil thickness, porosity and soil texture from sandy loam to clay. The chemical properties of soils fluctuate strongly, especially soil salinity and depending on type of soil, but in general, soils react neutral to weak alkaline, with high basic saturation. Soils have medium to high phosphorus and potassium conccentration and moderate fertility .sandy soil group, however, has low fertility.