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The article focuses on the concentration and chemical fractions of copper, zinc, nickel and chromium in Japanese andisols, which had accumulated swine composts and chemical fertilizers for six years. The unique properties of andisols including high anion exchange capacity, low bulk density, and high organic matter content may influence the accruement of heavy metals. The potential risks of the aggregation of heavy metals as well as its impact on plant tissues, soils and surface waters are also discussed.