5). Mixed area
This referred the processing 2 different suitability class for sugarcane production which
could not be clearly separated. This was resulted from data limitatio n particularly soil data (soil associate which appears in the soil map). The area in this category, in other words, possessed 2
classes of suitability which were the combination of S2/S3 (Moderate and marginal suitability) on
other combinations. In Udon Thani, there were altogether 3 areas which fell into this cattery
occupying total area of 1,381.144 km
2
or 11.78% of the province.