This looks like AI, too many details in the toes, rest of the foot, legs and knees. It would be a wonder to find one such turnip, let alone a matching one
I wonder if this an evolution of the square watermelons known in Japan.
I doubt you could make it have this level of details and I think that technique cannot be used for stuff that is grown in the soil
You’re probably right, and this in particular seems to be a sculpture with a turnip plant glued on top, per @Tolookah@discuss.tchncs.de