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This study was conducted to estimate the full bloom stage of the Fugi apple at e in different elevationsat Chungju area. The lapse rate of air temperature related to the elevation in Chungju area wascalculated and applicated to estimate the full bloom stage of the Fugi aple cultivar at differentelevations. The data for nine levels of elevations at 150, 250, 350, 555, 710 m with the direction of S-Win the Mt. Gyemyong and at 165, 255, 415, 545 m with the direction of N-W in the Mt. Nam wereanalyzed. The lapse rate range were 0.89oC per 100 m elevation in the Mt. Gyemyong and 0.74oC inthe Mt. Nam respectively. The difference of full bloom stage at different elevations was 4 to 5 days per100 m and its range was from April 29th at 100 m to May 10th at 400 m.