Phosphorous cycle: Slowest bio-geochemical cycle - Environment & Biodiversity

Q.  Among the following which is the slowest bio-geochemical cycle?
- Published on 28 Aug 15

a. Phosphorous cycle
b. Water cycle
c. Nitrogen cycle
d. Carbon Cycle

ANSWER: Phosphorous cycle
 
In this cycle, phosphorous moves from the land to sediments in ocean and back to land. It can remain in the sea floor for millions of years. When the sea floor/land emerges from the ocean, the phosphorous will be in the rocks again.

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