questions: asking about nursery pre stocking pond preparation 
 answers: 1 st dose: apply cowdung @ 1000 kg per bigha: 7 days before seed stocking
2 nd dose: apply cowdung @ 600 kg per bigha, ssp @ 33 kg per bigha and mustard oil cake @ 33 kg per bigha: after 7 dyas of stocking 
thank you