Bill - Great work! I saw a couple of things in your technique that I liked, such as pulling the pole up a bit and then nudging the pole back/forth with your bucket, which helped break the bond of hard-baked clay against the pole bark and made your final pull easier. Good for you for resisting the urge to chain-up and throttle up and let-er-rip, as I have seen (and maybe have done myself).
I use some of the same skills dragging logs out of field edges, trying to remain mindful of potential collateral damage.
This thread demonstrates to power of GTT: put your challenge out there, solicit input, filter to your needs, perform the task and report back. What you did may help others with similar issues