Multiple choice

While sowing seeds, the fertiliser commonly used contains

  1. nitrates

  2. potash

  3. phosphorous

  4. calcium
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A Correct answer
Explanation

Nitrogen-containing fertilizers like ammonium nitrate and calcium ammonium nitrate are commonly applied during sowing to support early vegetative growth. While phosphorus (DAP) is also used at sowing, nitrogen fertilizers containing nitrates are very common. Potash is usually applied later, and calcium is a secondary nutrient.

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