Question: query regarding when to transplant the boro rice seedlings and doses of fertilizer use  before transplanting. 
Answer: seedlings should be transplanted 30 days after sowing. 

recommended fertilizer dosesfor boro rice-

 urea-18 kg, super 27 kg and potash 6 kg per bigha of land. 9 kg urea, 27 kg super and 6 kg potash should be apply 4-5 days before sowing and other half of urea should be broadcast 30 days after transplanting.