Certified Crop Advisor Practice Exam 2025 – Complete Study Resource

Question: 1 / 400

Among the following nitrogen sources, which has the least percentage of nitrogen?

Ammonium sulfate

Urea

Calcium nitrate

Fish emulsion

Ammonium sulfate contains about 21% nitrogen, which is relatively lower than the nitrogen content found in other listed sources.

Urea, often used for its high nitrogen content, typically contains around 46% nitrogen. Calcium nitrate also boasts a substantial nitrogen content, approximately 15.5% nitrogen, making it a good source for crops. Fish emulsion, while its nitrogen percentage can vary based on formulation, generally offers a range of 4% to 6% nitrogen.

In summary, ammonium sulfate indeed has a lower percentage of nitrogen compared to urea, calcium nitrate, and even fish emulsion, positioning it correctly as the source with the least nitrogen content among these options.

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