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| The flow of chemical elements and compounds between living organisms and the physical environment. |
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the water beneath the surface of the ground, consisting largely of surface water that has seeped down: the source of water in springs and wells. |
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| The movement between various reservoirs |
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| When the water evaporates from terrestrial ecosystems passes through the plants |
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| the circulation of carbon atoms in the biosphere as a result of photosynthetic conversion of carbon dioxide into complex organic compounds by plants, |
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| the continuous sequence of events by which atmospheric nitrogen and nitrogenous compounds in the soil are converted |
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| any process of combining atmospheric nitrogen with other elements |
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| any bacteria that combines nitrogen with oxygen or hydrogen to create compounds that is usable by plants |
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| the formation of ammonia or its compounds by decomposition of organic matter |
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| the addition of a nitro group to an organic compound |
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| the loss and removal of nitrogen or nitrogen compounds |
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Definition
| the movement of phosphorus from the environment to organisms and back to the environment |
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