There was no casualty but several houses around the farm developed cracks due to the blast and the structure where the explosives were stocked collapsed, a police official said.
Deviya Rane said it is historic that no legislator (in Goa) has won consecutively so many times from the same seat.
Rane, 87, who has served as the chief minister of the coastal state for six times, had won from the Poriem assembly constituency as many as 11 consecutive times.