The phosphorus cycle

The sulfur cycle

The nitrogen cycle

The carbon cycle

The phosphorus cycle does not include a gaseous phase, resulting in no significant quantities of atmospheric phosphorus.

Phosphorus is not fixed in the atmosphere by lightning.

Phosphorus does not enter the cycle from weathering of sediments and parent material.

Phosphorus is not taken up by plants and is a strictly inorganic cycle.

Phosphorus is cycled back into the soil through precipitation.

Rock

Rainwater

Plants

Animals

Soil