Which of the following soil orders represents highly weathered, nutrient-poor tropical and subtropical soils rich in iron and aluminum oxides, typically displaying a reddish or yellowish hue?

💡 Solution & Explanation

Oxisols are heavily weathered, highly leached mineral soils found predominantly in tropical and subtropical climatic zones, characterized by significant accumulations of iron and aluminum oxides that impart a reddish or yellowish coloration. Their intense weathering leaves them with low inherent nutrient fertility. Other soil orders like Gelisols or Vertisols form under completely different thermal and moisture regimes. Pedology and soil classification are important topics in physical geography.