[Russpig]

Once pigs have rooted and upturned a section of ground and then moved to fresh ground.

What does everyone do
eg leave it to come back itself,
or reseed etc??

[Richmond]

We leave ours to come back by itself. Having said that we only have one lot of weaners per year, and sometimes miss a year, so the ground has plenty of time to recover - we have permanent pens built underneath mature beech trees.
The ground comes back mainly as weeds but the next lot of pigs deal with those pretty swiftly, even the nettles.
My husband has been saying for years he is going to plant Jerusalem artichokes once the pigs are off, so that the next lot of pigs will reap the benefits, but he's not got round to it yet!

[Rupert the bear]

put the leveler and the roller over it and it comes back by itself

[SallyintNorth]

We let it grow, then graze it with native cattle, then primitive cross sheep, then native ponies.  It only comes flat again if we roll it, so we try to do that at some point, mainly so we can poo pick the ponies.