Hi Lance,
I no longer grow in traditional soil. Instead I grow exclusively in woodchips heavily decayed by Wine Cap mushrooms. I keep raised beds,about a foot tall, filled with wood chips that have been inoculated with Wine Cap spawn. The resulting
compost is extremely fertile and I no longer need to add any additional fertility to my garden beds. I keep a long running and occasionally updated thread about my mushroom experience HERE:
https://permies.com/t/80/82798/composting-wood-chips-chicken-litter
And I have a detailed set of step-by-step instructions HERE:
https://permies.com/t/130092/mushroom-newbie
I hope this helps and if you have any questions, feel free to ask.
Eric