This tree is repotted in akadama four years ago and for safety we only removed the soil from the outside and we kept the core of the root ball intact. The tree has now all new roots on the outside.
The core of the root ball is still old nursery soil and needs to be removed.
We started to remove old nursery soil underneath in the center of the root ball and let the outside akadama soil untouched.
By repotting in this way, the tree gets no stress. If we had removed all the soil at once the tree would have been completely bare rooted, which is never good for conifers or Pines.
The tree back in the pot with new akadama inside and a little new akadama on the outside. The tree can start now with a complete new root ball.