I run a a volunteered composting operation at the landfill I run. We use oak and pine sawdust from the cabinet shop on our roads to run trucks on the clay to the working face. Composting wood waste that is fresh takes away too much nitrogen till its composted a certain point and makes nitrogen.
I add urea pellets to my wood chips. About 50% nitrogen. I spread the chips and urea over my clay soil (3 inches thick of chips), run a 3 bottom plow, then till it. 4 1/2 years later (wood chips break down very slowly
Right now the soil is like a sponge.
Bob