The stage class model was developed by rule based
approach. We define stage class to 3 classes base on physical characteristic of Para
rubber plantation indicate Young stage (2 - 8 years) , Harvested stage (>8 - 20
years) and Mature stage (>20 years). The zonal were used boundary derived from
image segmentation process and then calculate statistics into attribute of variables
such as Minimum, Maximum, Mean, Range and Standard deviation. In addition
the fuzzy logic was selected to threshold determinate for resolve uncertainly stage
class of Para rubber plantation.