Area: 6,876,430 ha
Based on the rocks and the processes of change, the land is divided into 5 gray Feralit following sub-units:
- Land development Feralit gray clay and metamorphic rock (XFS)
- Land development gray Feralit on acid magma (XFA)
- Land developer Feralit gray sandstones (Xfq)
- Land development Feralit gray sediment on the neck (Xfp)
- Land gray Feralit change due to wet rice cultivation (Xfe)
b. Some of the gray soil subunit Feralit
Due Feralit gray area of the huge land, to see clearly the nature of the soil movements, this section describes some of the soil subunit on different rocks:
gray soil Feralit developed on shale (XFS):
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