Just picked up a couple of pu truck loads of sawdust from the sawmill today. First load was fresh stuff for use in humanure pile. Second load was dark brown to black, earthy smelling and had plenty of mycelium in it. Is that well rotted enough to add to soil without supplementing nitrogen?
My son has had good luck planting in sawdust as you describe...he dug it at an old, old saw mill site. Yours sure sounds well rotted the way you describe it. I used some that was very old but not well rotted one time and it was not good for the plants...the blueberries all died.
"We're all just walking each other home." -Ram Dass
"Be a lamp, or a lifeboat, or a ladder."-Rumi
“When it is understood that one loses joy and happiness in the attempt to possess them, the essence of natural farming will be realized. The ultimate goal of farming is not the growing of crops, but the cultivation and perfection of human beings.”
― Masanobu Fukuoka, The One-Straw Revolution
I will suppress my every urge. But not this shameless plug:
It's like binging on 7 seasons of your favorite netflix permaculture show