In case of which one of the following biogeochemical cycles, the weathering of rocks is the main source of release of nutrient to enter the cycle?
- ACarbon cycle
- BNitrogen cycle
- CPhosphorus cycleCorrect
- DSulphur cycle
Explanation
The phosphorus cycle is unique among the major biogeochemical cycles because it does not have a significant gaseous phase in the atmosphere. The primary reservoir of phosphorus is found in rocks, particularly in phosphate-containing minerals. Phosphorus is released from these rocks into the soil and water through the slow process of weathering and erosion. From there, it becomes available for uptake by plants and enters the food web. In contrast, carbon, nitrogen, and sulphur cycles all involve significant atmospheric components and pathways for nutrient release beyond just rock weathering.
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