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Production Know How
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Seed Density in Nursery

1. To reduce the cost of cultivation, it is necessary to optimize the seed rate because the seed cost of hybrid rice is more than high yielding varieties. 2. Multi-locational trials were conducted at different places under AICRIP with 3 seed rates (10, 20 and 30 g/m2) in nursery and 25 day old seedlings were transplanted in main field at 20 x 10 cm with one or two seedlings/hill. 3. The results indicated that 10 or 20 gm/m2 seed rate in nursery recorded higher grain yield (4.44 to 4.49 t/ha) over 30 g/m2 (4.23 t/ha). 4. Low sowing rate usually promote tillering and seedling vigour. 5. The grain yield differences between one (4.34 t/ha) and two seedlings/hill (4.44 t/ha) was not appreciable.

Nursery Management


1. A nursery area of 1000 sq. m. is sufficient to transplant one hectare. Plough nursery field twice under dry condition.
2. Apply wherever possible decomposed and powdered farm yard manure @ 500 kg/1000 sq. m.
3. Puddle two to three times subsequently in standing water (2 - 3 cm), preferably at intervals of five days.
4. Level the field perfectly after final puddling and prepare seedbeds of 1.0 to 1.5 m width and of convenient length leaving 30 cm wide channels in between the beds.
5. Apply 5 to 10 kg N, 5 kg P2O5 and 5 kg K2O for every 1000 sq. m. area of the nursery before the final levelling. Double the Phosphatic fertilizer where low temperature retards seedling growth.
6. In zinc deficient areas, apply Zinc Sulphate @ 3 - 4 kg/1000 sq. m. Iron chlorosis (seedling yellowing) can be prevented either by spraying 2 per cent Ferrous Sulphate solution 2 to 3 times at weekly intervals or by frequent inundations.
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