Phosphorus(P) (7) Organic matter(OM). If land evaluation for paddy rice will add soil
reaction(pH) factor.
3) Evaluation of land suitability based on topography, two factors were used
which included: (1)Landform (LF) and (2)Slope(SP).
4) Evaluation of land suitability based on area, this process used resulting layers
of suitability based on climate, soil and topography to overlay together.
5) Land suitability for sugarcane production, three factors were used which
include: (1) Resulting layer of evaluation of land suitability based on area (2)Irrigation
information layer and (3)Soil salinity information layer.
4.3 Establishment of spatial database base on land suitability for each crop
production, this process is creating spatial database to support land use planning. All land
suitability layers were overlaid together and kept in new layer.
4.4 Creating land use plan, the spatial database was supported to create two
provincial land use plan which based on land potential by selecting high and moderate
suitability for economic crops and crops' prices.