Clay Mineralogical Composition of Representative Paddy Soils in Northern Part of Northeastern Japan

DOI Web Site 2 Citations 27 References
  • SANO Oki
    Field Science Center, Graduate School of Agricultural Science, Tohoku University:(Present office)Bicchu General Service Bureau of Okayama Prefecture
  • ITO Toyoaki
    Field Science Center, Graduate School of Agricultural Science, Tohoku University
  • ANDO Tadashi
    Shonai Branch Office of Yamagata Prefecture
  • NANZYO Masami
    Graduate School of Agricultural Science, Tohoku University
  • SAITO Genya
    Field Science Center, Graduate School of Agricultural Science, Tohoku University:(Present office)Toyohashi University of Technology
  • SAIGUSA Masahiko
    Field Science Center, Graduate School of Agricultural Science, Tohoku University:(Present office)Toyohashi University of Technology

Bibliographic Information

Other Title
  • 北東北地方の代表的な水田土壌の粘土鉱物組成
  • キタトウホク チホウ ノ ダイヒョウテキナ スイデン ドジョウ ノ ネンド コウブツ ソセイ

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Abstract

Paddy soils (166 points) in northern part of northeastern Japan were classified according to clay mineralogical composition. Smectitic and semi-smectitic paddy soils were dominant in Tsugaru Plain, western part of Aomori Prefecture. Amorphic volcanic ash soils were widely distributed in Sanbongihara terrace, eastern part of Aomori Prefecture. Smectitic and semi-smectitic paddy soils were observed in valley bottom lowland of rivers between Sanbongihara terrace. In Iwate Prefecture, paddy soils were diverse in clay mineralogical composition type in river terraces of Kitakami River (mixed type, smectitic etc.). Mixed type and semi-smectitic paddy soils were observed in alluvial lands of Kitakami River. Amorphic volcanic ash soils were distributed in northern part of Iwate Prefecture. In Akita Prefecture, semi-smectitic and chloritic paddy soils were observed in alluvial lowlands of Yoneshiro River. Smectitic paddy soils were observed in Hachirogata reclaimed land. Paddy soils were diverse in clay mineralogical composition type in Yokote basin (mixed type, chloritic, smectitic and dominant in 2:1-2:1:1 intergraded minerals). Tertiary sedimentary rocks or tuffs were distributed in upper reaches of many alluvial paddy soils, which contain substantial amount of smectites.

Journal

  • Pedologist

    Pedologist 52 (1), 10-18, 2008-06-30

    Japanese Society of Pedology

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