Multiple choice

Which of the following fertilizers has the highest percentage of nitrogen?

  1. Calcium ammonium nitrate

  2. Ammonium sulphate

  3. Calcium nitrate

  4. Urea

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Urea (CO(NH2)2) contains approximately 46% nitrogen by mass, the highest among common nitrogen fertilizers. Calcium ammonium nitrate has ~27%, ammonium sulphate has ~21%, and calcium nitrate has ~15% nitrogen. Urea's high N content makes it efficient.