Mohammad Isam is ESPNcricinfo's Bangladesh correspondent. @isam84
Batting first, Khulna rode on centuries from Mahedi Hasan and Tushar Imran as they reached 444 in 124.3 overs. Mahedi finished on 177 off 290 balls with 16 fours and two sixes while the veteran Tushar struck 16 fours and a six in his 132 off 196 balls. The pair added 272 runs for the third wicket.
Left-arm spinner Monir Hossain took career best figures of 7 for 85 while Tanvir Islam took two wickets.
Barisal were bowled out for 258 runs in 80 overs with Al-Amin Hossain and Abdur Razzak taking four wickets each. Nuruzzaman struck his maiden first-class century, remaining unbeaten on 101 off 175 balls with eight hours and three sixes. When he came to bat, Barisal were reeling on 91 for six after which he added 80 runs for the seventh wicket with Rafsan Al Mahmud who made 58.
Khulna batted again, reaching 216 for seven in 49 overs to set Barisal a 403-run fourth innings target. Razzak then took five wickets while Moinul Islam picked up three wickets as Barisal were shot out for 163 runs in 61 overs. Fazle Mahmud top scored with 88.
Rain allowed only 96.3 overs of play in the Dhaka Division-Rangpur Division match at the Shaheed Chandu Stadium in Bogra. Play was completely abandoned in the first two days before only an hour was possible on the third evening.
Resuming on 49 for no loss on the fourth day, Rangpur declared their first innings on 237 for two with fifties for Saymon Ahmed, Jahid Javed, Suhrawadi Shuvo and Nasir Hossain. Saymon and Jahid had retired after reaching their fifties to make way for the other batsmen.
The match was called off at 3.32pm after Dhaka had reached 150 for three in 44 overs. Rony Talukdar top scored with 60.
The match between Dhaka Metropolis and Sylhet was abandoned without a ball being bowled. Rain ruined all four days with play being called off around mid-day every day.
On the fourth day, the umpires called off the match at 12.10pm.
Rain also had a major hand in Rajshahi where the home side and Chittagong Division were forced to sit out most of their match. But both sides at least got some points out of the contest thanks to clear weather on the final day.
Batting first, Chittagong posted 432 runs in 142.5 overs with Yasir Ali Chowdhury top scoring with 94. Irfan Shukkur and Sazzadul Haque also made fifties. Shariful Islam took three wickets.
In reply, Rajshahi were bowled out for 415 runs in 118.3 overs that included half-centuries from Jahurul Islam, Junaid Siddique and Farhad Hossain. Mohammad Saifuddin finished on three wickets. There was enough time for Chittagong to bat one over in their second innings before the match ended.