The soil is alluvial soil that has a diameter of particles ranging from 0.05-2.0 mm of soil texture resembles coarse. Clay tablets did not cause the island draining very quickly and therefore cannot be a catchment.
Sandy soil is clay with a particle diameter of from 0.05 to 2.0 mm. Texture resembles coarse soil. No soil adhesion Thus draining much faster Can not retain water is.
The sandy soil with the diameter of the particles from the 0.05-2.0 mm soil texture look rough. เม็ดดิน islands not together, make the drainage fast. Can't retain water.