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It was explained the genesis of different soil types from the standpoint of biochemical composition of plants. It was proposed a systematic methodology of research of lignin transformations in the series: plant tissues–litter–litter–soil–humic acid. It was proposed a typology of processes of lignin phenols biochemical transformations in soils of zonal row: forest, steppe, meadow, tropical, agro-anthropogenic types; it is proved that the structure of the molecules humic acids is largely determined by the phylogenetic origin of lignin. It was shown the probable ways of lignin transformation in soils depending on the thermodynamic conditions of the environment are shown.