questions: asking about fretilizer requirement for 1 bigha paddy cultivation 
 answers: recommended to apply 18 kg urea, 9 kg super, 8 kg potash per bigha .  half of the urea i.e. 9 kg and the entire amount of super and potash should be apply at the initial stage of land preparation. remaining half amount of urea i.e. 9 kg should be top dressed after 30 days (4.5 kg) and 45 days 4.5 kg).