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Yield prediction model of rice based on the boundary line analysis of the relationships between riceyield and meteorological conditions during rice growing period was reported in the previous report(Kim et al, 2001). Using the 15-year data of the 20 locations used for the model formulation and of the12 locations not used, the model was tested for its predictability of location to location, year to year,and variety to variety variation of rice yield. The model predicted reliably the mean yield differencesamong locations, the yearly yield variation in each location, and the yield variation by variety.However, the model showed relatively lower predictability for the years of cool weather injuryespecially in mountainous locations. In conclusion, the model using boundary line analysis could beused to predict the yield responses to meteorological conditions during rice growth period and thelocational, yearly, and varietal variations of rice yield. And the predictability of the present yieldprediction model might be improved by including the boundary line analysis for the other factorssuch as soil characteristics, fertilization levels, etc.