By the way, this pole is not weight bearing (I think), here is another photo from another wider angle... (click on image to enlarge)
I also noticed that other poles (except this corner one) the builder left at least one inch above grade, I don't know why he didn't do that for this specific corner pole...
Can I use "wood hardener" to treat that rotted wood? Or should I just cut off the part that is burred in the ground? Since it's not weight bearing so I assume that would be OK? Thoughts or comments? Thanks!