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biofuels biomass lignocellulosic biomass lignin ethanol monolignols catalysis hydrogenolysis watershed organic crops soil mangement thermochemical conversion biofuel biochemical method corn thermochemical method pretratment ionic liquid dilute acid base-catalyized depolymerization hydroenation biochemical conversion gasification depolymerization bioenergy conversion pyrolysis thermochemical converision bioenegy microalgae biodiesel algae fences erosion waterway runoff managment practices tillage