FIELD: agriculture. SUBSTANCE: biohumus is prepared from hydrolyzed lignin preliminarily subjected to ammonization. The latter operation is accomplished by treating hydrolyzed lignin with concentrated aqueous ammonia. After adjusting pH of ammonized lignin by treating it with lime solution to neutral value, thus prepared substrate is placed into beds and worms are allowed to enter. EFFECT: improved quality of humus with elevated nitrogen level and reduced preparation time.
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