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| Q. |
The element which is required by the plant in large quantity – |
| A. | Calcium |
| B. | Nitrogen |
| C. | Phosphorus |
| D. | Sulphur |
| Answer» B. Nitrogen | |
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Explanation: All plants need nitrogen to make amino acids, proteins and DNA, but the nitrogen in the atmosphere is not in a form that they can use. Plants use nitrogen by absorbing either nitrate or ammonium through the roots. |
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