Which of the following fertilizer carriers has the highest percentage of nitrogen analysis?

Anhydrous ammonia is known to have the highest percentage of nitrogen analysis among the options provided. It is a pure nitrogen source that contains approximately 82% nitrogen by weight. This high concentration makes it an effective fertilizer for promoting plant growth and enhancing crop yields.

Urea, while a common nitrogen fertilizer, contains about 46% nitrogen. Urea-ammonium nitrate solution (UAN) typically has a nitrogen content ranging from 28% to 32%, depending on the specific formulation. Diammonium phosphate (DAP), on the other hand, is mainly a source of phosphorus and contains about 18% nitrogen.

Choosing anhydrous ammonia as the correct answer is based on understanding the purity and concentration of nitrogen in different fertilizer carriers. This knowledge is critical for agronomy practices, as it helps farmers and agricultural professionals select the most effective fertilizers for their crop needs.