Question

Match List-I with List-II

List-I (Soil Moisture/Temp Regime) & List-II (Mean Annual Soil Temperature)
(A) MESIC & (I) 15$^\circ$C to $<$ 22$^\circ$C
(B) THERMIC & (II) 8$^\circ$C to $<$ 15$^\circ$C
(C) HYPERTHERMIC & (III) 28$^\circ$C or more
(D) MEGHATHERMIC & (IV) 22$^\circ$C to $<$ 28$^\circ$C

• (A) - (I), (B) - (II), (C) - (III), (D) - (IV)
• (A) - (IV), (B) - (II), (C) - (III), (D) - (I)
• (A) - (II), (B) - (I), (C) - (IV), (D) - (III)
• (A) - (III), (B) - (IV), (C) - (I), (D) - (II)

Hint:

Remember the temperature hierarchy from coldest to hottest:
Frigid ($< 8^\circ\text{C}$) $\rightarrow$ Mesic ($8-15^\circ\text{C}$) $\rightarrow$ Thermic ($15-22^\circ\text{C}$) $\rightarrow$ Hyperthermic ($22-28^\circ\text{C}$) $\rightarrow$ Megatheric/Megathermic ($\ge 28^\circ\text{C}$).

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
Soil Temperature Regimes (STR) are diagnostic criteria used in Soil Taxonomy to classify soil series based on the mean annual soil temperature (MAST) measured at a depth of 50 cm from the soil surface.

Step 3: Detailed Explanation:
Let us analyze the standard temperature ranges for each diagnostic soil temperature regime:
- (A) MESIC $\rightarrow$ 8$^\circ$C to $<$ 15$^\circ$C (II): Soils in this regime are cool to mild, typical of temperate climates.
- (B) THERMIC $\rightarrow$ 15$^\circ$C to $<$ 22$^\circ$C (I): Soils in this regime are warm, characteristic of warm temperate and Mediterranean climates.
- (C) HYPERTHERMIC $\rightarrow$ 22$^\circ$C to $<$ 28$^\circ$C (IV): These are very warm soils, typical of subtropical and tropical climates.
- (D) MEGHATHERMIC $\rightarrow$ 28$^\circ$C or more (III): These represent extremely hot soils, typical of hot arid and tropical equatorial regions.
Matching these definitions gives:
(A) $\rightarrow$ (II)
(B) $\rightarrow$ (I)
(C) $\rightarrow$ (IV)
(D) $\rightarrow$ (III)
This corresponds to Option (C).

Step 4: Final Answer:
The correct matching sequence is (A) - (II), (B) - (I), (C) - (IV), (D) - (III).