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¹ Akdeniz Üniversitesi, Ziraat Fakültesi, Tarım Makinaları Bölümü, Antalya Viewed : 1553 - Downloaded : 925 In this study, effects of flotation technique and time on separating filled seeds of watermelon and melon by flotation in water were investigated. Three different flotation techniques and times were used for each seeds. As a result of the tests, the flotation technique in which the seeds were mixed in vertical direction in water, for 1 minute flotation time gave better results than the other used techniques and times. When this technique and 1 minute time were applied, it was determined for watermelon that 84.21% of the filled seeds sank and 95.52% of the sunken seeds were filled seeds. In this technique and time, in spite of 15.79% loss of the filled seeds, seed quality increased at a proportion of 19.52%. In melon that 77.77% of the filled seeds sank and 94.92% of the sunken seeds were filled seeds. In this technique and time, in spite of 22.23% loss of the filled seeds, seed quality increased at a proportion of 22.22%. Keywords : Melon, Watermelon, Flotation Method, Filled Seed, Seed Quality