Question: asking abouth potato varieties. 
Answer: recommended varieties for assam- early mature varieties- kufri chandramukhi, kufri pukhraj. late mature varieties- kufri jyoti, kufri sinduri, kufri megha. 
 two days before sowing please treate the seed with any one of the following fungicide- trichoderma viridi 10gram/liter of water, carboxin/ maneb/ glyodin 3gram/ liter of water for 30 minutes and then spread in a single layer in polythene or gunny bag for two days, on 3rd day sow the seed by maintaining 50 cm distance in furrows.