NOVELTY - Producing an agent, comprises (i) grinding a biomass (90) feedstock to produce ground biomass particles, (ii) subjecting the ground biomass particles to sequential or concurrent ramps of temperature and pressure shocks, (iii) selectively collecting at least one volatile component as it is released from the ground biomass particles, (iv) collecting a last remaining non-volatile component comprising biomass fractionator apparatus (94) (BMF) char, (v) rendering a surface of the BMF char (100) hydrophilic, (vi) exposing the BMF char to microorganisms, and (vii) adding the BMF char to soil.    USE - The method is useful for: producing an agent for enhancing soil growth (claimed); and rendering char from BMF. No biological data given.    ADVANTAGE - The method exhibits improved thermal conductivity, improved bioavailability and hospitable environment for bacteria, archaea and fungi necessary for plant growth.    DETAILED DESCRIPTION - Producing an agent, comprises: either (i) grinding a biomass (90) feedstock to produce ground biomass particles, (ii) subjecting the ground biomass particles to sequential or concurrent ramps of temperature and pressure shocks, (iii) selectively collecting at least one volatile component as it is released from the ground biomass particles, (iv) collecting a last remaining nonvolatile component comprising biomass fractionator apparatus (94) (BMF) char, (v) rendering a surface of the BMF char (100) hydrophilic after collecting the BMF char by removing adsorbed gas within char pores by introducing a water solution containing soluble plant nutrients, (vi) exposing the BMF char to microorganisms after rendering the surface hydrophilic, and then (vii) adding the BMF char to soil after exposing the BMF char to microorganisms; or (ia) grinding a biomass feedstock to produce ground biomass particles having a diameter of 0.001-1 inch, (iia) dispensing the ground biomass particles into thin sheets whose total thickness is a multiple of the ground biomass particle diameter, (iiia)-(via) the steps (ii)-(v) as above per se, (viia) adding the BMF char to soil after rendering the surface hydrophilic, and then (viiia) exposing the BMF char to microorganisms.    DESCRIPTION OF DRAWING(S) - The figure shows a flowchart of the decomposition of biomass.    Dried biomass (90)    Size reduction (92)    Biomass fractioning reactor (94)    Organic chemicals (96)    BMF char. (100)