Question: query regarding use of profex super in potato. 
Answer: if you have seen any kind of insect infestation in the potato field then only use the profex super 2ml/liter of water 3 times at 5 days interval in the evening time in the absence of rain. if you not apply any kind of fertilixer till now then at the time of second earthing up please use bio rhizobium  10 gram per squar meter of land.