What do you mean by 'split'?
Parsnips 'fork' ie develop more than one root when they encounter an obstacle in the soil, or if the tap root is damaged or when the tap root meets richer soil as in a lump of animal manure.
The only other time parsnips split. ie develop a cut in the surface is when they are rehydrated after a dry spell after the skin has set.

Hi there. A quick internet search for 'splitting parsnips' will give you all the info you need. :)

Its nice that they germinated - no sign of mine at all...

Parsnips are notorious for their low germination rate.

Nothing is very low indeed....

That's one vegetable I just buy from the farmers' market.

I'll give them a month and then give them up as a bad job.