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The seed rate naturally influences the growth of the seedlings. Thin sowing gives strong and tillered seedlings, whereas thick sowing results in thin and tall seedlings without tillers.
Thin sowing in nurseries is always better and it will produce strong and sturdy seedlings, which can withstand adverse climatic conditions better and produce better yields. Therefore, 40 to 60 grams of seed per square metre should be sown in the nursery beds. About 500 square metre area of nursery is sufficient to transplant one hectare area. In case of late sowing of nursery, the nursery area should be increased to 750-1000 square metre.
Shaik N. Meera, R. Mahender Kumar, P. Muthuraman, L.V. Subba Rao and B.C. Viraktamath (2014). A Handbook of Package of Practices for Rice. Directorate of Rice Research, Book No. 80/2014. p.365.