I. It is the process of removal of constituents in suspension or solution by percolating water from upper to lower layers.
II. It is the process of deposition of soil material in the lower layers
Understanding Soil Formation Processes
The question asks to identify two key soil-forming processes based on provided descriptions.
Analyzing Statement I
Statement I describes the process where soil constituents (like minerals and organic matter) are washed out or removed from the upper soil layers (A horizon) by moving water. This removal occurs either in suspension or dissolved in solution.
This process is known as Eluviation. It leads to the formation of a lighter-colored layer, often called the E horizon, depleted of its original material.
Analyzing Statement II
Statement II describes the process where the materials removed from the upper layers (through eluviation) are accumulated or deposited in the lower soil layers (like the B horizon).
This deposition process is known as Illuviation. It results in the formation of a layer enriched with the materials washed down from above, such as clay, iron, and aluminum compounds.
Identifying the Correct Combination
Based on the analysis:
- Statement I corresponds to Eluviation.
- Statement II corresponds to Illuviation.
The question asks for the processes "respectively", meaning in the order they were presented. Therefore, the correct combination is Eluviation and Illuviation.
Comparing this with the options, Option 3 correctly states "Eluviation and Illuviation, respectively".
Important Questions from Formation Of Soil
- A red coloured and clayey soil horizon is termed as
- Match the following
A. Calcification E. Warm and humid climate B. Laterization F. Solution in carbonate rocks C. Karstification G. Potential evapotranspiration equal or greater than precipitation D. Podzolization H. Cool and moist climate - A grassland soil that contains dark and thick mineral surface horizon, abundant humus and basic cations, and remains soft after drying is known as:
The production of organic acids accelerates leaching in the soil horizon
Read the following statements about clay particles and choose the CORRECT answer
$\text{I}$ : Clay particles are platy. Therefore water tension acts on their large surface area to cause cohesion.
$\text{II}$ : Clay particles have electrically charged surfaces. Charges on the clay attract opposite charges on other particles, holding them together.
