Probiotic infused lignocellulosic soil amendment and growth medium

A method of treating soil consisting of mixing a composition consisting essentially of spawn that is fully integrated on a lignocellulosic substrate with the soil in an amount effective to degrade the lignin content of said lignocellulosic substrate, and thereby enrich the nutrient content of said soil, wherein said spawn is of a lignin-digesting fungal species, and both of said spawn and said lignocellulosic substrate are desiccated so that said spawn is in a non-vegetative state and said composition has a water content less than about 5 wt % and said composition is mixed directly with said soil in an amount between about 0.025 and about 0.60 tons per acre.