Which of the following is NOT associated with podzolization?

Correct option is B

The correct answer is (B) Removal of Silica

Explanation:
• Podzolization is a complex soil-forming process (pedogenic process) characterized by the extreme leaching of bases, iron, aluminum, and organic matter from the upper horizons.
• In this process, Silica is not removed; instead, it remains behind in the eluvial horizon (E horizon), giving it a light, ashy-grey appearance. In contrast, iron and aluminum oxides are moved downward.
• Podzolization occurs typically in cool, humid climates under coniferous forests or heath vegetation where the litter is acidic and low in calcium.
• The process involves the "cheluviation" of iron and aluminum by organic acids, which then deposit these materials in the B horizon (illuvial horizon).

Information Booster:
• The word "Podzol" is of Russian origin, meaning "ash-like" (pod = under, zola = ash).
• The diagnostic horizon formed by this process is the Spodic horizon.
• Podzolization leads to the formation of highly acidic soils with low fertility, often found in the Boreal forest zones.

Additional Knowledge:
• Removal of Fe & Al (Option A): This is a core part of podzolization where iron and aluminum are leached from the A/E horizon.
• Removal of humus (Option C): Soluble organic matter (humus) acts as a chelating agent and is transported downward with the metals.
• Acidic condition (Option D): Podzolization strictly requires a low pH (acidic) environment to facilitate the mobilization of metallic oxides.