Question
A red coloured and clayey soil horizon is termed as
The correct answer is
B horizon
Soil Horizon Identification: Red and Clayey Layer
The soil horizon described as red coloured and clayey is the B horizon.
Key Characteristics:
- The B horizon, also known as the subsoil, is where materials like clay, iron oxides, and other minerals accumulate.
- These accumulated materials often give the B horizon a distinct colour, frequently reddish or brownish due to iron oxide content.
- It is typically denser and more clayey than the upper layers.
Why other options are incorrect:
- O horizon: This is the uppermost layer, consisting mainly of organic matter (leaves, twigs, humus).
- A horizon: This is the topsoil, a mixture of mineral soil material and decomposed organic matter (humus). It's often dark but not specifically defined by being red and clayey.
- E horizon: This layer, found below the O or A horizon, is characterized by leaching (eluviation) of clay and iron. It typically appears lighter in colour than the A horizon.
Therefore, the red, clayey horizon is the B horizon.
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Important Questions from Formation Of Soil
- 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:
- Read the following statements and identify the corresponding soil forming processes
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 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.
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