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GeoJournal

, Volume 28, Issue 2, pp 139–151 | Cite as

Cumulic soils on Rakata, Sertung and Panjang (Krakatau Is.) and properties of each Solum

  • Shinagawa A. 
  • Miyauchi N. 
  • Higashi T. 
Article

Abstract

  1. 1.

    Cumulic soils: Rakata: soils mainly derived from the re-deposited 1883 pyroclastic flows. Sertung: several layers of scoria and volcanic ash originating from Anak Krakatau are deposited on the pyroclastic flows. Panjang; cumulic stratification is similar to that of Sertung but the scoria layers are relatively thin compared with those of Sertung.

     
  2. 2.

    Properties of the soils. (a) Soil textures of the 1883 pyroclastic flow soils are finer than that of the soil originating from Anak Krakatau deposits. (b) Carbon contents of surface soils on Rakata are about 9% but those of the other soils are below 2%. pHs(N-KC1) of surface —and buried — A horizon originating from pyroclastic flows are about 4.5–5.6. (c) Smectite exists in the clay fraction of sub soils originating from pyroclastic flows but crystalline clay minerals are not detected in the surface soils on Rakata nor in soils originating from Anak Krakatau deposits. (d) The contents of inorganic N and exchangeable K in the soils on Panjang are higher than those on Sertung, and plant succession on Panjang has progressed more rapidly than on Sertung.

     
  3. 3.

    Compared with Krakatau soils, Japanese young volcanic ash soils have progressed more rapidly to Andisol than have soils originating from the Anak Krakatau deposits. The clay content of Japanese pyroclastic flows is less than that of Krakatau pyroclastic flows.

     

Keywords

Clay Stratification Environmental Management Carbon Content Surface Soil 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Kluwer Academic Publishers 1992

Authors and Affiliations

  • Shinagawa A. 
    • 1
  • Miyauchi N. 
    • 1
  • Higashi T. 
    • 2
  1. 1.Fac. Agr. Koorimoto-1-21-24Kagoshima UniversityKagoshima
  2. 2.Tsukuba UniversityTsukubaJapan

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