I don't disagree that removing it from the ground later will do no harm. I can just see that the OP moves out in August and has to dig this pole and cement out of the ground. Nice, hot and humid day and that job will be NO fun.
Before declaring the landlord a "moron" or anything, who's to say he wouldn't agree to an added clause in the lease ? What would be a reasonable $ amount to charge if the tenant fails to remove it ? I'm guessing there'd be no agreement on that.... Whatever the landlord says, it will be too much.
Of course digging it out will be no fun, but if someone wants their Dish service, sometimes they have to sacrafice some time/labor.
Based on the current posts, my guess is the landlord wouldn't be for a added clause to the lease. Sounds like the guy is a prick no matter how nice you are to him.
A reasonable amount could be something the tenant/landlord agreed with before the clause was added and signed upon. Or the clause can simply state the cost will be whatever a handyman would charge to come out and do it (Maybe even the average of 3 quotes). This can be easily done and agreed upon if both parites are level headed. I know (being a landlord myself) that I have no problem agreeing to things like this and coming up with a reasonable arrangements with my tenants.