Situation A : Growth and branching of roots in the A-horizon and B-horizon is advantageous for absorption of water and minerals.
Situation B: C-horizon is rich in humus which makes soil soft and porous.
Choose the correct option.
Only Situation A is true
Let's analyze each situation presented in the question to determine the correct answer.
- Situation A: "Growth and branching of roots in the A-horizon and B-horizon is advantageous for absorption of water and minerals."
- The A-horizon of soil, known as the topsoil, is where most biological activity occurs. It is rich in organic material and nutrients, making it ideal for root growth and for plants to absorb water and minerals.
- The B-horizon, or subsoil, lies beneath the A-horizon. It often has less organic material but is important for the storage of minerals leached down from the topsoil.
- Roots growing and branching in these horizons can indeed enhance the absorption of water and minerals, supporting plant growth.
- Situation B: "C-horizon is rich in humus which makes soil soft and porous."
- The C-horizon is the layer of soil that consists mostly of weathered parent material and is located beneath the B-horizon.
- It is generally devoid of humus compared to the A-horizon, which is why it is often not soft and porous. Instead, it acts as a transition layer to the bedrock.
- This statement is incorrect because the presence of humus is characteristic of the A-horizon, not the C-horizon.
Based on this analysis, Situation A is true, and Situation B is false. Therefore, the correct answer is: Only Situation A is true.
Important Questions from Soils
- Which soil is acidic in nature and found in high rainfall areas?
The soil that is present over the piedmont plains such as Chos and Duars is
Which of the following statements regarding Soil is/are FALSE?
1. Fertile soil supports plant growth by providing plants with nutrients, acting as a water holding body and serving as the substrate to which plants anchor their roots.
2. Vegetation, tree cover and forest prevents soil degradation and desertification by stabilizing the soil, maintaining water and nutrient cycling.
3. Grass found on pasture lands cannot protect the soil against soil erosion and also inhibits the soil biological activities.
Choose the correct answer from the options given below:With reference to the different types of soil found in India, identify the pairs which is/are wrongly matched.
1. Submontane soil - These are formed by the deposition of eroded material and are found in the Tarai region stretching from Jammu and Kashmir to Assam.
2. Karewa soil - These are the lacustrine deposits found in the Kashmir valleys and Bhadarwah Valley.
3. Peaty and Marshy soil - These are typical soils of the monsoon climate characterised by seasonal rainfall and is deficient in organic matter.
4. Laterite soil - These soils are rich in humus and organic matter.
Choose the correct answer from the options given below:Match List I with List II.
List – I (Pedogenic Process) List – II (Description) A. Podzolization I. It is associated with humid cold mid-latitude climates and coniferous vegetation B. Laterization II. It is associated with soils found in tropical and subtropical environments C. Calcification III. It is associated with warm, semi-arid environments, usually in grassland vegetation where evapotranspiration exceeds precipitation D. Gleization IV. It is associated with poorly drained and water logged areas of cold climates and peat is found in the upper portion of the soil
