Step 1: Understanding the Question:
The question asks to match specific soil-forming (pedogenic) processes and reactions with their technical scientific terms. Detailed Explanation:
• A -- Podzolization (II):
This is typical in humid, cool climates under coniferous forests. Organic acids leach out iron and aluminum oxides and humus from the topsoil (E horizon), leaving it light-colored and acidic. The material accumulates in a "Spodic" B horizon.
• B -- Gleisation (III):
In waterlogged, anaerobic conditions, iron is reduced from the ferric ($Fe^{3+}$) to the ferrous ($Fe^{2+}$) state. This gives the soil a characteristic bluish-grey or mottled color. A soil layer formed this way is called a "Glei" horizon.
• C -- Pedoturbation (IV):
This refers to the physical mixing of soil horizons. It can be biological (earthworms/rodents), physical (frost churning/cryoturbation), or due to the cracking of heavy clays (argilliturbation).
• D -- Eluviation (I):
This is the general term for the downward movement of soil components (clay, carbonates, oxides, salts) from an upper horizon to a lower one due to percolating water. It represents the "mobilization" and "translocation" phase. Step 2: Final Answer:
The correct matching is A-II, B-III, C-IV, D-I.
