𝐌𝐚𝐠𝐢𝐜𝐚𝐥 𝐭𝐫𝐚𝐜𝐭𝐨𝐫

The first is that the tractor drove off of the road and turned a corner into a field - a common activity for a tractor to do. "The car turned into the driveway," "I turned left into Main Street," etc.

The second is saying that since this was a magical tractor, actually it physically turned/transformed into a field. "The magician turned his hat into a rabbit," "The caterpillar turned into a butterfly