I could probably leave a large portion of root crops in the ground up until January, except I just don’t have any luck with growing them .............heck, I even have trouble with radishes. No one has trouble growing radishes, except me. LOL.
Losing my corn crop really bugs me, however, my 500 row feet is nothing compared to the 100’s of acres of corn many of my real farmer friends are losing. I can put in second and late crops of other things because my farming is on such a small scale - they can’t.
Do you have light soil. You probably have an extreme nematode problem and while they will affect a lot of crops they really, really affect root crops.