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A field experiment was carried out with the objectives to evaluate and assess the suitability of Turmeric seed rhizome sizes under mid hill conditions of Arunachal Pradesh. The experiment consisted seven treatments of different grades of Turmeric rhizome var. Megha Turmeric-1. The results of study revealed that heavier the mother rhizome, gave better plant growth characteristics. Further it was reported that use of 50-60 g mother rhizome as a planting material resulted in maximum in case of all biometric characteristics with a plant height (121.33 cm), leaf size of length (62.79 cm), breadth (18.05 cm), number of leaves per plant (7.33), number of tillers per plant (4.24), and stem girth (2.20 cm) which were significantly higher as compared to the treatments with smaller rhizomes. As far as fresh and dried rhizome yields are concerned, mother rhizomes (50-60 g) yielded maximum fresh rhizome (24.58 t/ha) and dried rhizome yield (4.79 t/ha) which reduced considerably with small seed size. Curcumin and oleoresin, an important biochemical property in turmeric were also exhibited maximum in terms of percent and yield when mother rhizome was 50-60 g used as planting material and this amount is followed by mother rhizome (30-40 g).

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