The purpose of study was to improve the quality and yield of three different apple cultivars for district kalam agro-climatic condition. The three cultivars were treated with four different concentrations of boron at pink bud stage. Statistical analysis revealed that boron application at (1.5%) concentration significantly improved fruit dimeter (8.01 cm), yield plant-1 (73.88 kg), firmness (5.39kg cm-2). While on the other hand number of fruits kg-1 and the physiological disorder are significantly reduced with 1.5% boron application. Royal Gala was found with minimum bitter pit and fruit corking while increased yield plant-1. Apple cultivar Jonica has maximum fruit diameter, fruit firmness, while minimum sun scald disorder. Apple cultivars Golden Smoothee has maximum TSS. The interaction of boron levels and apple cultivars was observed non-significant for all the parameters. It was concluded from the  experiment  that  boron  at  rate  of  1.5%  significantly  increased yield plant-1 while decrease, fruit firmness,  titratable  acidity,  bitterpit, sun scald and fruit corking.

Keywords: Apple, Cultivars, Boron, Agro climatic condition