Soil formation is initiated through the process of:
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Answer: A. Weathering
Explanation
Pedogenesis or soil formation is fundamentally initiated through geological weathering processes. Physical and chemical weathering break down solid parent rock into smaller mineral particles. This initial disintegration creates the foundational substrate required for subsequent biological soil development. Temperature fluctuations and freeze-thaw cycles mechanically fracture hard bedrock over centuries. Acidic rainwater and biological exudates chemically alter mineral crystals within the parent rock. Weathered rock fragments mix with early organic colonizers to form primitive soil horizons.
Geomorphologists study weathering rates to understand landscape evolution and soil age. Agricultural productivity depends heavily on the mineral composition derived from weathered parent material. Mining reclamation projects require artificial weathering simulations to jumpstart soil regeneration. Option B describes gleization, which is a waterlogged soil reduction process occurring later. Option C represents laterization, a specific weathering regime typical of humid tropical regions. Option D is the general term for soil genesis, which begins with weathering as its initiator.
- Subject
- Agriculture
- Category
- Forestry
- Topic
- —
- Difficulty
- medium
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