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Q11
(CISF/2018)
Geography › World Physical Geography
Which one of the following is the largest component of the soil system ?
Result
Your answer:
—
·
Correct:
B
Explanation
Soil is a complex mixture of four primary components: mineral matter, organic matter, water, and air. According to standard soil science and NCERT textbooks, the approximate volumetric composition of a typical productive soil is:
- Mineral matters (45%): This is the largest component, consisting of inorganic materials like sand, silt, and clay derived from the weathering of parent rocks.
- Soil Solution/Water (25%): This fills the pore spaces and carries dissolved nutrients to plant roots.
- Soil Air (25%): This occupies the pore spaces not filled by water, providing oxygen for root respiration.
- Soil Organic Matter (5%): This includes humus, roots, and living organisms (which constitute only a tiny fraction of this 5%).
Since mineral matter accounts for nearly half of the soil's volume, it is the largest component. Options A, C, and D represent significantly smaller proportions of the soil system.
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SIMILAR QUESTIONS
Which one of the following is the largest composition in biogas?
The organic component of soil, formed by the decomposition of leaves and other plant materials that adds to the fertility of the soil is called :