Cavities or channels formed within the soil matrix by fauna like earthworms and flora roots are designated_________?
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Answer: A. Biopores
Explanation
Biopores are continuous cavities and channels created within the soil matrix by fauna and flora. Earthworms burrow through subsurface layers, leaving behind stable tubular channels for fluid movement. Plant roots penetrate deep into the profile, and their subsequent decay leaves open macropores. Macroporosity created by biological activity significantly enhances the saturated hydraulic conductivity of soils. These natural channels bypass the dense soil matrix, facilitating rapid water infiltration during intense rainfall. Soil fauna activity is widely recognized as a primary bio-engine for improving soil structural tilth.
No-till farming preserves biopore networks, ensuring high water infiltration rates and reducing surface erosion. Compaction from heavy machinery destroys these vital channels, severely impairing subsurface aeration and drainage. Root penetration relies heavily on pre-existing biopores to navigate dense subsoil layers successfully. Diameter refers to a linear measurement of circular objects and has no relation to soil cavities. Mesopores describe medium-sized pore spaces that typically retain plant-available soil moisture against gravity. Microspores are extremely small pore domains where water is held tightly by strong capillary forces.
- Subject
- Agriculture
- Category
- Agriculture
- Topic
- —
- Difficulty
- medium
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