Found in 3 areas: big river tributaries The Chi River in the Mekong River region, it will get a new sludge every year. There is a moderate resolution, ranging from soil for farming. There are bad drainage conditions. Kitchen garden planting is mostly used.
Found in the three major rivers, the Mekong river Chi River sediments will be renewed every year. Who, from medium resolution Suitable for farming Poor drainage conditions Of the soil is well drained or somewhat better. Most crops in the kitchen garden.
Found in the 3 the big river include Havel, Chee River, Mekong, the mentioned will be new sediment every year. The ground meat from fine medium suitable for use a farmer the drainage bad.Most use planting gardens.