In calcium ammonium nitrate (CAN) fertiliser ____________________?
Correct answer: D. Nitrate nitrogen is quick acting
- A. None of these
- B. Ammoniacal nitrogen is quick acting
- C. Nitrate nitrogen is slower acting
- D. Nitrate nitrogen is quick acting
Explanation
Nitrate nitrogen is immediately available to plants, whereas ammoniacal nitrogen generally acts more slowly because it may first undergo conversion in the soil. Thus CAN combines a quick-acting nitrate fraction with a slower ammoniacal fraction.
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