Which fertilizer is noted for producing high concentrations of ammonia and should not be placed near seeds?

Diammonium Phosphate (DAP) is a fertilizer that contains both nitrogen and phosphorus, with a significant amount of nitrogen in the form of ammonium. When DAP is applied to the soil, it can lead to the production of high concentrations of ammonia as it breaks down. Ammonia is a volatile compound that can harm seeds if they are planted too close to areas where DAP has been applied. High ammonia concentrations can affect seed germination and nutrient uptake, potentially leading to poor crop establishment.

In contrast, the other fertilizers listed contain either minimal or no nitrogen in an ammonium form. For example, Triple Superphosphate primarily provides phosphorus without significant ammonia, while Liquid Phosphorous and Monopotassium Phosphate also focus on delivering phosphorus and potassium with negligible nitrogen risks. Thus, these options do not pose the same concerns regarding ammonia toxicity to seeds. This makes Diammonium Phosphate the clear choice when considering the risks associated with ammonia concentration near seeds during planting.