Assertion A Volcanic soils are usually fertile Reason R The heat of eruption causes fertility o...........

World Geography (Easy) World - Soil and Vegetation

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Assertion (A) : Volcanic soils are usually fertile.

Reason (R) : The heat of eruption causes fertility on such soils.

Both A and R are true and R is the correct explanation of A

Both A are R is true and R is not the correct explanation of A

A is true but R is false

A is false but R is true.

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Explanation:

A is true but R is false
Volcanic soils form by weathering of volcanogenic materials. Their distribution on the Earth parallels that of terrestrial volcanoes, and they are found across various climates, but most of them are classified as Andisols. This soil group shares unique physical and chemical properties largely attributable to the formation of poorly crystalline and noncrystalline minerals, and the accumulation of organic matter.