They tried a 10' limit several years ago and it just didn't seem to work so they abandoned it. They sent some trap net samples to the lab and had them aged and they reported that the crappie in Nimrod grow fast. It's only a 3550 acre lake and on most years has terrific spawns.
We had a very small farm pond when I was a kid and the crappie were plentiful but probably over populated. Always caught small ones. The bass gorged themselves on them though. Caught bass up to 8 lbs!