Very fine-grained, iron oxide particles account for nearly all red, yellow, and brown soil colours.

Question

Quizplus · Accepted Answer

This statement is true. Iron oxide particles are responsible for the red, yellow, and brown colours in soil. These colours are due to the presence of different forms of iron oxides. For example, red soil is usually high in iron oxide (Fe2O3), whereas yellow soil is typically high in iron hydroxide (FeOOH).

Very Fine-Grained, Iron Oxide Particles Account for Nearly All Red