Certified Crop Advisor Practice Exam

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Prepare for the Certified Crop Advisor Exam. Study using multiple-choice questions with detailed explanations. Enhance your understanding and pass the exam confidently!

Practice this question and more.

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

Ammonium sulfate
Urea
Calcium nitrate
Fish emulsion

The correct answer is: Ammonium sulfate

The source with the least percentage of nitrogen among the options provided is fish emulsion. Fish emulsion typically contains about 4 to 7 percent nitrogen, which is significantly lower than the percentages found in other sources. Ammonium sulfate has about 21 percent nitrogen, making it one of the more concentrated sources. Urea is also high in nitrogen, containing about 46 percent nitrogen, while calcium nitrate has around 15.5 percent nitrogen. This difference in nitrogen content is important for applications in agriculture, as it directly influences the amount of fertilizer needed to achieve desired plant growth and yield. Understanding the nitrogen content of different fertilizers allows for more effective nutrient management in cropping systems.