Why are the phosphorous and sulfur cycles considered to be sedimentary cycles?

The phosphorus cycle:  is a sedimentary cycle (unlike carbon, oxygen, and nitrogen),Phosphorus enters the biosphere almost entirely from the soil through absorption by plant roots.

The sulfur cycle is the collection of processes by which sulfur moves between rocks, waterways

Explanation:

Sedimentary cycles are the ones in which the reservoir is the Earth's crust.

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geographic isolation