Agronomy Degree Practice Exam

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What is the guaranteed analysis for urea?

35-0-0
46-0-0
82-0-0
21-0-0

The correct answer is: 46-0-0

Urea is a widely used nitrogen fertilizer that contains a high percentage of nitrogen, making it an effective source for plant nutrition. The guaranteed analysis reflects the percentage of each nutrient that the fertilizer contains by weight. For urea, the analysis is expressed as nitrogen (N), phosphorus (P), and potassium (K). In the case of urea, it has a guaranteed analysis of 46% nitrogen and no phosphorus or potassium, which is represented as 46-0-0. This high nitrogen content is one of its key features, enabling significant nitrogen availability to plants when applied correctly. The other analysis options do not represent urea's true composition. For instance, while common fertilizers may have lower nitrogen amounts, none would match the specific high nitrogen content that urea provides, as indicated by its guaranteed analysis of 46-0-0. This makes urea particularly valuable for applications requiring substantial nitrogen inputs to promote healthy plant growth.