</font><font color="blue" class="small">( Forget the beer, get the Jack.
Seriously, get something round, and fairly large like an old truck rim (no tire just the rim) or a chunk of tree trunk and a stout chain with hooks on the ends. Take the chain and hook it around the post right at the ground line (give it 2 wraps and it will bite into the wood as you do the next step). Feed the chain over the rim or tree trunk (the rim in the vertical position). If you use a rim and the ground is soft, put a peice of plywood under the rim so it don't sink in the ground. If a tree trunk forget the plywood. Attach the other end of the chain to your tractor's drawbar (if you have a little tractor or if the wheels spin as you pull, get your pickup truck or your car or SUV or whatever that is heavier and pull with that.
As the chain is pulled over the rim or tree trunk, it will pop the post right out of the ground no matter how stubborn it is. )</font>
5030 is the winner. I used his method with the chain attached to my Honda Ridgeline (the BX was too light and spun its tires). It came right out. Thanks again.
The old truck wheel trick works very well, as long as there is enough post left to wrap the chain around. I remember watching my Grandfather do that trick, and being amazed at how well it worked. (I was 5 at the time!)