questions: asking about blackgram varieties for assam ,seed rate,duration of the crop 
 answers: suggested to select varieties like ku 301 (mid august-mid september) ,saonia mah (mid july -mid august) having duration of 80-90 ,70-80 days respectively for this season.for ku 301 variety seed rate 3-3.5 kg/bigha (line sowing),3.5 kg/bigha (broadcast) is advised.