Chester Brown Industries has developed the Post Pulla tm. It is a robust and very efficient way to remove Star Pickets. No damage to the posts and you can remove a fully established fence as the Post Pulla reaches over the top wire to grab the post. Over 1 kilometre per hour to pull down a fence. The post pulla is the only dedicated Post Pulla that can remove a Star Picket that only has 20mm of the post sticking out of the ground.
Tested to 5T pull its more about your tractor than the post pulla.