On what soil characteristics does infiltration capacity primarily depend?
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ANumber of voids present in the soil
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BShape and size of soil particles
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CArrangement (fabric) of soil particles
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DCompaction (density) of the soil particles
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EAll the above
Answer
Correct Answer: All the above
Explanation
Introduction:Infiltration capacity is the maximum rate at which soil can accept water under given conditions. It is a function of soil structure and texture, which control pore connectivity and capillary forces.
Given Data / Assumptions:
- Options list void ratio/porosity, particle geometry, arrangement, and compaction.
Concept / Approach:Large, well-connected pores (macropores) raise capacity; fine, poorly connected pores reduce it. Particle size/shape and fabric influence pore geometry. Compaction reduces voids and connectivity, lowering infiltration capacity. Therefore, all listed properties matter.
Step-by-Step Solution:Relate each property to pore size distribution and connectivity.Infer impact on gravitational and capillary flow paths.Conclude that all properties jointly control capacity.
Verification / Alternative check:Soil physics shows infiltration increases from clays → loams → sands (texture/structure effects) and declines with compaction and crusting.
Why Other Options Are Wrong:
- Any single factor explanation is incomplete; multiple soil attributes interact.
Common Pitfalls:
- Ignoring soil structure (aggregation, biopores) and focusing only on texture.
Final Answer:All the above.