Match List-I with List-II

List-I (Soil type)	List-II (Bulk density, Mg/m³)
(A) Peat	(I) 2.0
(B) Compact	(II) 1.1 to 1.4
(C) Fine textured	(III) 1.4 to 1.75
(D) Coarse textured	(IV) 0.5

Choose the correct answer from the options given below:

Correct option is A

Explanation of the Correct Option (a): (A)-(IV), (B)-(I), (C)-(II), (D)-(III)
(A) Peat → (IV) 0.5 Mg/m³
· Peat soils are rich in organic matter.
· Very low bulk density due to high porosity.
· Typical bulk density ≈ 0.2–0.6 Mg/m³.
(B) Compact → (I) 2.0 Mg/m³
· Compacted soils have:
· Very low pore space
· High mass per unit volume
· Hence, they show very high bulk density.
(C) Fine textured → (II) 1.1 to 1.4 Mg/m³
· Clayey and silty soils:
· Higher total porosity
· Lower bulk density than sandy soils
· Typical bulk density falls in this range.
(D) Coarse textured → (III) 1.4 to 1.75 Mg/m³
· Sandy soils have:
· Larger particles
· Less total pore space
· Hence, relatively higher bulk density.
Explanation of Other Options
Option (b)
· Incorrect because:
· Peat cannot have the highest bulk density.
Option (c)
· Incorrect matching of compact and peat soils.
Option (d)
· Incorrect because:
· Fine-textured soils do not have bulk density as high as 2.0 Mg/m³.
Key Points Related to the Question
· Bulk density = Mass of dry soil / total soil volume
· Influenced by:
· Texture
· Structure
· Organic matter
· Compaction
· Lowest bulk density → Peat soils
· Highest bulk density → Compacted soils