in paddy soils: the layer comprising the puddled layer and the plough
both showing a reduced matrix and oxidized root channels
dark, high content of organic matter and P, high animal activity, high
base saturation; resulting from long-term cultivation, fertilization and
application of organic residues
in paddy soils: the layer below the anthraquic horizon showing
redoximorphic features and/or an accumulation of Fe and/or Mn