National 0 1 min readDistrict watch in pictures: BOGRA: A day-long field day for the two new improved varities of potato was held at Rainagour Spices Research Center in Shibganj Upazila on Wednesday. 6 Mar 2016, 12:00 am0BOGRA: A day-long field day for the two new improved varities of potato was held at Rainagour Spices Research Center in Shibganj Upazila on Wednesday. admin .