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| Q. |
Which of the following is not a nitrogenous fetiliser? |
| A. | Ammonium sulphate |
| B. | Urea |
| C. | Ammonium nitrate |
| D. | Superphosphate |
| Answer» D. Superphosphate | |
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Explanation: Superphosphateis a common synthetic phosphorus fertilizer. It contains phosphorus and sulphur in a ratio of 1 to 1.22. It is produced by treatment of "phosphate rock" with acids such as sulphuric acid. Superphosphate is the principal carrier of phosphate, the form of phosphorus usable by plants, and is one of the world's most important fertilizers. |
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