| 11. | Animal urine forms part of the nitrogen cycle.
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| 12. | All these processes contribute to the nitrogen cycle.
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| 13. | His research contributions lead to the finding that the photorespiratory nitrogen cycle is an open process.
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| 14. | An arbuscular mycorrhizal fungus significantly modifies the soil bacterial community and nitrogen cycling during litter decomposition.
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| 15. | It has subsequently been cited in numerous other papers dealing with changes in the nitrogen cycle.
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| 16. | It is also needed in the reduction of nitrate into ammonia for plant assimilation in nitrogen cycle.
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| 17. | In the artificial environment of the aquarium, the nitrogen cycle effectively ends with the production of nitrates.
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| 18. | Therefore, as part of the nitrogen cycle, it is essential for agriculture and the manufacture of fertilizer.
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| 19. | The discovery of anammox process modified the concept of biological nitrogen cycle, as depicted in Figure 2.
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| 20. | A simple diagram of the nitrogen cycle.
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