Peat Soils or Histosols
Reference: Bellamy, J.A & McAlpine, J.R (1995).
Papua New Guinea Inventory of Natural Resources, Population Distribution and Land Use Handbook (2nd edition),
PNGRIS Publication No.6, CSIRO - AIDAB,queensland complete Printing Services, Australia, 155 pp
Classification based on codes shown below (See Table III - 14. codes for soil class on page 143 of reference above);
211 = Cryofolists Freely drained, little decomposed and mostly shallow organic soils found in cold climates (10326.64589 km2 dark blue colour)