Summary:
Rooted dirt cannot be tilled with a hoe if there is a block above it. In Java Edition, it can be tilled, which is intentional per MC-226964.

Steps to Reproduce:

1. Place a block of rooted dirt
2. Place a block on top of the rooted dirt
3. Use a hoe on the rooted dirt

Observed Results:
Nothing happens.

Expected Results:
The rooted dirt turns into a dirt block and drops roots.

Video:
Minecraft 2021-06-05 16-56-01.mp4