I own a Kubota TG2754, 54" Dozer blade for TG1860 and TG1860G tractors. (That's the writing on the cover)That is not a dozer blade. Dozer blades don't have spring trips on them. However, I would doubt that the ground is frozen hard enough in NC to run a plow without skid shoes to keep from ripping up the dirt.
I also have the operator's and parts manual. It's called, by Kubota, 54" dozer blade and has a spring attached to it!
Apparently some dozer blades can have springs.