Can Nebraska’s defense improve to end the year or are they going to remain an issue?

-In Pelini’s first year in 2008, Nebraska’s defense had a rough start to the year, but rebounded at the end (with better talent, to be fair), and held several opponents below 300 total yards of offense, despite some big numbers against them in the first half of the season. Is that possible with this group or not? Maybe not that type of a leap in yards allowed per game, but definitive improvement? Hard to measure that, though.