The hex value for the turnip is linked to the "grown" turnip static and not the harvested/stackable veggie. (The current hex is used for placing on fields and not as an edible food).
No, the current turnip artwork is the turnip that is shown in the field. It looks like a green bush.
When you "set amount: 2" It shows just 1 grown bush. This art is NOT stackable, as it was not intended to be in the backpack.
The Hex value I've provided shows a dug-up turnip with a stem. When the artwork is 'set amount 2, it shows two of them. This art is stackable and is supposed to be used in the backpack.