Geography question from JKAS Prelims, 2018 by JKPSC
In the pedogenesis, by mixing activities, earthworms improves the
Last updated May 30, 2026
Correct Answer:
Option A —
Structure
Soil Structure vs. Soil Texture:
Structure refers to how soil particles (sand, silt, clay) are grouped, bound, and arranged together into aggregates or clumps. Earthworms directly improve this by burrowing, breaking up compacted soil, and passing soil through their digestive tracts. Their slime and excretions (casts) cement soil particles into stable, nutrient-rich aggregates.
Texture refers to the relative percentage of sand, silt, and clay particles. Earthworms cannot alter the inherent texture of the parent material.
Pedogenesis Connection: In the process of soil formation (pedogenesis), earthworms act as "ecosystem engineers." Their mixing activities (known as bioturbation) create macro-pores that increase aeration, water infiltration, and structural stability.
Answer verified by Quintessence Classes faculty — Karan Nagar, Srinagar.
