最終更新日：2024/08/01
(soil science) A diagnostic soil horizon of the USDA soil taxonomy that is cemented by illuvial silica into a subsurface hardpan.
正解を見る
duripan
編集履歴（0）
(soil science) A diagnostic soil horizon of the USDA soil taxonomy that is cemented by illuvial silica into a subsurface hardpan.
duripan
DiQt（ディクト）
無料
★★★★★★★★★★
