Now that the outside temps are colder, it's much easier to keep the root cellar temperature at the proper level. I aim for somewhere between 32 and 36, with high humidity. The humidity has also been easy -- we've got a naturally dank basement, and thanks to 14 inches of rain in October, the ground is still saturated. Our average annual rainfall is 21 inches. Our basement subpump is still running every other day or so, which is pretty much unheard of in January here.
I took a quick inventory of the goodies in my root cellar, and I must say I am verily pleased. 95% of the potatoes are still good. It seems the Kerr's Pink variety doesn't last as long as the others, so I'll know to eat those first next year. And the blight spots and green spots don't seem to affect storage longevity. Also, the thickness of the skin hasn't been a factor--the thin-skinned spuds are doing just as well as the thick-skinned ones.
My few rutabagas turned soft and mushy back in December. Next year I think I'll plant them later in the season and keep them in the garden as long as I can. The beets didn't last long, either. Not a big loss, as my family doesn't like beets. But still good to know.
My two remaining cabbages are looking pretty decent, as are the two winter squash I have in the cellar. I've read that squash prefer a warmer storage temp, somewhere around 50 degrees. I have most of my squash in the main basement area, but I thought I'd experiment and put a couple in the cellar. So far so good.

And I've still got about two bushels of apples left. They look fine as well. If they start to go bad I'll do some processing. Anybody know how long apples will last in a root cellar?

Another surprise -- in my scrounging I found a forgotten tray of sand and carrots. When I saw them I winced, expecting a soggy mass of carrot mush. But when I reach my hand in, I was amazed to find most of the carrots still firm. They still had their short spikes of green stem sticking up, but apparently they stopped growing when the cellar temps dropped down far enough. I am elated by this, as I was not looking forward to buying supermarket carrots so soon.
So, overall the root cellar has been a fantastic success. I haven't had to buy any carrots, cabbage, potatoes, apples or squash so far this winter, and it looks like my boxes of seed potatoes will stay good long enough to plant next spring.
'To plant next spring.' Doesn't that phrase sound lovely!