MasteryExams
Geography • Physical GeographyHard

Which type of soil order, according to US Soil Taxonomy, is characteristic of highly weathered, acidic soils of tropical and subtropical regions rich in iron and aluminum oxides?

A. Mollisols
B. Spodosols
C. Oxisols✓ Correct Answer
D. Gelisols

💡 Solution & Explanation

Oxisols are heavily weathered, infertile mineral soils typical of tropical and subtropical rainforest environments, characterized by large accumulations of hydrated oxides of iron and aluminum. These soils lack weatherable minerals and derive their reddish color from iron sesquioxides.

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