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Phosphorus circulates through water, the earth's crust, and living organisms in the phosphorus cycle, de-picted in Figure 3-21. In contrast to the cycles of water, carbon, and nitrogen, the phosphorus cycle does not include the atmosphere. The major reservoirs for phos-phorous is phosphate salts containing... show more Phosphorus circulates through water, the earth's crust, and living organisms in the phosphorus cycle, de-picted in Figure 3-21. In contrast to the cycles of water, carbon, and nitrogen, the phosphorus cycle does not include the atmosphere. The major reservoirs for phos-phorous is phosphate salts containing phosphate ions in terrestrial rock formations and ocean bottom sediments. The phosphorus cycle is slow compared to the water, carbon, and nitrogen cycles.
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