Q. Which fertilizer contains the highest percentage of nitrogen?
Answer: Urea
Notes: Urea is a white crystalline solid containing about 46% nitrogen. Urea is widely used as a fertilizer and animal feed additive in agriculture. No other solid fertilizer has a higher nitrogen content than urea. Ammonium nitrate contains about 34% nitrogen, calcium ammonium nitrate about 26%, and calcium nitrate about 15.5% nitrogen.
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