The main objective of model calibration was to adapt the model parameters to local environmental conditions (i.e. weather parameter, soil properties and crop management) so as to gain a good overall agreement between simulated yield from the i-EPIC Model and observed yield were collected from the office of Agricultural Economics, Ministry of Agriculture and Cooperatives.
Crop parameters data were applied from Wang et al. (2005) (Table 3.2) for calibration. The values in the range (Table 3.2) to be calibrated to simulated yield in extreme weather close to observed yield.