The Queensland Bulls will need to hold their nerve tomorrow morning if they are to finish their Gabba summer on a high after another high octane day of JLT Sheffield Shield cricket.

Jake Lehmann remains South Australia's last hope of victory against Queensland following another wicket-laden day today as the combination of the famed Gabba pitch, always-swinging Dukes ball and humid conditions made life problematic for all batsmen.

Winless South Australia will go into day three at 7-94, still requiring another 80 runs for victory.

Lehmann is unbeaten on a match-high 41, with Nick Winter on three after SA's inexperienced top-order slipped to 5-32 in pursuit of 175 to win.

Incredibly, Lehmann and Winter also started the day at the crease, albeit batting in SA's first innings.

Mark Steketee did most of the damage for the home side taking 4-16 as he added more scalps to his season tally that now sits at 37 wickets so far this season.

SA's latest collapse capped another extraordinary day in which 20 wickets fell, outdoing the 17 wickets that fell on day one.

The number of wickets to fall outnumbered boundaries hit in the match until late on day two.

SA resumed at 7-67, but added just four to their overnight total to concede a 44-run first innings deficit.

But Queensland in reply lost wickets at regular intervals to be bowled out just before tea for a match-high 130.

There were failures for Queensland's experienced top-three with Matt Renshaw (11), Joe Burns (0) and Marnus Labuschagne (3) all dismissed cheaply.

Sam Heazlett top-scored with 37, despite being troubled by a quad strain, while tail-end contributions from Mark Steketee (21) and Mitch Swepson (14) could prove the difference in the final wash-up.

SA seamer Joe Mennie returned figures of 3-16, while left-arm spinner Tom Andrews collected 3-42 to be a wicket shy of a first 10-wicket match haul.