List-I
(Soil type)List-II
(Description)A. Histosols 1. Soils with a
subsurface horizon
of clay
accumulation,
highly leached;
commonly found in
humid tropical and
subtropical
climates.B. Oxisols 2. Soils with a thick
upper layer very
rich in organic
matter (0.25%) and
containing
relatively little
mineral material.C. Ultisols 3. Very old, highly
leached soils with
subsurface
accumulation of
iron and aluminium
oxides, commonly
found in tropical
environments.D. Vertisols 4. Soils that develop
deep, wide cracks
when dry (shrink
and swell) due to
high clay content
(0.35%) and are not
highly leached.
Code:A B C D (a) 4 3 1 2 (b) 2 1 3 4 (c) 2 3 1 4 (d) 4 1 3 2
A-2, B-3, C-1, and D-4
To match the soil types in List-I with their descriptions in List-II, we need to identify the characteristics of each type of soil and match them with the correct descriptions:
- Histosols: These soils are known for having a thick upper layer rich in organic matter. Generally, they are characterized by a high organic content and relatively little mineral material. Therefore, the correct description for Histosols is "Soils with a thick upper layer very rich in organic matter (0.25%) and containing relatively little mineral material." This matches with description 2.
- Oxisols: These are very old, highly leached soils with a subsurface accumulation of iron and aluminium oxides, commonly found in tropical environments. This matches with description 3.
- Ultisols: Soils of this type have a subsurface horizon of clay accumulation, are highly leached, and are commonly found in humid tropical and subtropical climates, which fits description 1.
- Vertisols: These soils develop deep, wide cracks when dry due to high clay content (0.35%) and are not highly leached. This matches with description 4.
Based on the above analysis, the correct answer is:
A-2, B-3, C-1, D-4
Thus, the correct code is option (c), which correlates to List-I and List-II as follows:
| A | Histosols | 2. Soils with a thick upper layer very rich in organic matter (0.25%)... |
| B | Oxisols | 3. Very old, highly leached soils with subsurface accumulation of iron... |
| C | Ultisols | 1. Soils with a subsurface horizon of clay accumulation, highly leached... |
| D | Vertisols | 4. Soils that develop deep, wide cracks when dry due to high clay content... |
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