The principal reservoir for the cycle is phosphate rock formed in past geologic ages, although excrement deposits (guano) by fish-eating sea birds and fossil bone deposits contribute substantial phosphate in certain areas of the world. Erosion by rainfall and the runoff of streams dissolves phosphate out of these reservoirs, forming phosphorus ‘pool’ in the soil.
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Phosphorus Cycle (2)
In this article we will discuss Phosphorus Cycle (2)