As long as we're on the subject of soil ...
I just finished upcanning a pot and I had to open a fresh bin of soil. As I was scooping it out, I was aware that I pull new soil out in a trenching motion, digging all the way to the bottom before taking any more off the rest of the top. The soil has enough body that it will hold a wall. And as I get to the bottom, the soil becomes heavier and wetter. Then I work my way sideways, still trenching. When I'm done, I spill the rest of the soil into the trench I made, smooth everything out, and put the lid back on.
And it occurred to me that not everyone would do that. Some people might just pull soil off the top and gradually work their way deeper. The soil at the top will be different than the soil at the bottom. Very rarely, we'll see someone who can't get the soil life going. I wonder ...
It's a small thing, but maybe it makes a difference.