The entire last page is one of the main reasons I gave up on soil. I realized I would have to purchase soil, good soil several times a year and reusing may not be an option.
In coco I can easily reuse. I know everything that is in it, nute wise and this is another biggy, I can't over water it.
All I see year after year is growers fighting with their soil, except fkin
@Mikedin he's a fkin wizard

but he's the exception. Everyone else, and I was right there with y'all for many years, is still trying to figure out what's missing or why is there too much of this or that and causing whatever behavior you're seeing.
I wish I would have switched long before I actually did