questions: asking about the nursery procedure and variety for knolkhol 
 answers: advised him to prepare seed bed of size 1.25 mt wide,15 cm height ,7 mt long.spray formalin 40 ml/lit water and cover it for 3 days.apply malathion dust.sow seeds uniformly and cover it till the seeds germinate.transplant at the age 45 days.variety white vienna.