Tropical black soil
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A general term for dark clayey soils found mainly in the tropics and subtropics. Regur is a typical example. It consists of thick, dark brown A and C horizons. The A horizon swells significantly when wet and shrinks significantly when dry, developing cracks, and the repeated swelling and shrinking tends to create uneven microtopography (gilgai). → Related article Deccan Plateau Source : Heibonsha Encyclopedia About MyPedia Information |
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熱帯を中心に亜熱帯にかけて分布する粘土質の暗色土壌の総称。レグールがその典型。厚い暗褐色のA層とC層からなる。A層は湿ると著しく膨潤し，かわくと著しく収縮して割れ目が発達，膨潤，収縮の繰返しにより凹凸に富んだ微地形（ギルガイ）ができやすい。 →関連項目デカン高原 出典 株式会社平凡社百科事典マイペディアについて 情報 |
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