…It usually refers to the light brown subsoil with little organic matter, corresponding to the black soil on the surface of volcanic ash soil. It is called Akanoppo, Akaonji, Akahoya, etc. depending on the region, and is often called loam in the field of surface geology. In general, the more basic the volcanic ash and the richer its iron content, the redder it is. *Some of the terminology explanations that mention "Akaonji" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…ふつう火山灰土壌の表層の黒土(くろつち)と対応させて,有機物の少ない明るい褐色の心土を指していう。地方によりアカノッポ,アカオンジ,アカホヤなどさまざまに呼ばれ,また表層地質学の分野ではローム(層)と呼ばれることも多い。一般に鉄分に富む塩基性の火山灰ほど赤みがつよい。… ※「アカオンジ」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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