gs1medium
In case of which one of the following biogeochemical cycles, the weathering of rocks is the main source of release of nutrients to enter the cycle?
- A.Carbon cycle
- B.Nitrogen cycle
- C.Phosphorus cycle
- D.Sulphur cycle
▶ Answer & Explanation
Correct answer: C. Phosphorus cycle
The phosphorus cycle is unique among major biogeochemical cycles as it does not have a significant atmospheric component. Phosphorus primarily exists in rocks and is released into the soil and water through the slow process of rock weathering. This makes geological processes, particularly weathering, the principal source of phosphorus entering ecosystems.
Source: UPSC gs1 2021