| 21. | Nitrogen fertilizer is relatively cheap, and farmers apply it liberally.
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| 22. | They also emit more nitrogen oxide, a contributor to smog.
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| 23. | One would inject nitrogen into the fuel tank on the ground.
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| 24. | Then eggs are put in liquid nitrogen at minus 321 degrees.
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| 25. | Flowers receiving excess nitrogen will be all foliage and few blossoms.
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| 26. | Below are nitrogen, phosphorus and potassium sources for garden use:
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| 27. | Ammonium nitrate : Fast-acting nitrogen source, slightly acidifying.
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| 28. | Ammonium sulfate : Fast-acting nitrogen source for alkaline soils.
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| 29. | A shortage of nitrogen will slow down the composting process considerably.
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| 30. | Other fossil-fuel pollutants include nitrogen oxide and sulfur dioxide.
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