Which dry nitrogen fertilizer carrier has an analysis of 46-0-0?

Urea is a solid dry nitrogen fertilizer that has a guaranteed analysis of 46-0-0, indicating it contains 46% nitrogen content, and no phosphorus or potassium. This high nitrogen concentration makes urea a popular choice for agricultural settings where crops require significant amounts of nitrogen for growth and development.

In contrast, urea-ammonium nitrate (UAN) is a liquid fertilizer that combines urea with ammonium nitrate but does not have the same analysis as urea alone. Anhydrous ammonia is another nitrogen source but is not a dry fertilizer; it is a gas that must be injected into the soil. Diammonium phosphate (DAP) is a fertilizer that contains both nitrogen and phosphorus but has a different analysis and does not meet the criteria of 46-0-0.

Therefore, the correct answer is based on the specific analysis that urea has a significantly higher nitrogen content compared to the other options presented.