sentence: Coniferous forests have acidic leaf litter and form what are known as inceptisols.
sentences_before: The organisms living in and on the soil form distinct soil types.
sentences_after: Mixed or deciduous forests leave a larger layer of humus, changing the elements leached and accumulated in the soil, forming alfisols. Prairies have very high humus accumulation, creating a dark, thick A horizon characteristic of mollisols.
concept_name: coniferous forest
headings: Pedogenesis
categories: Geology