What is a disadvantage of using Ammonium Sulphate (21-0-0)?

Using Ammonium Sulphate (21-0-0) can indeed be more expensive compared to other nitrogen sources, which is a notable disadvantage. This higher cost can impact the overall economics of fertilizer application for producers, especially those with tight budgets or who are price-sensitive. While it does provide nitrogen and sulfur, the focus here is on the financial aspect.

Other nitrogen sources, such as urea or anhydrous ammonia, may offer lower costs per unit of nitrogen, making them more appealing options for some farmers. Therefore, while Ammonium Sulphate has its benefits in terms of providing both nitrogen and sulfur to the soil, the higher cost can be a limiting factor in its widespread use.

In contrast, the potential for soil acidity, excessive sulfur supply, and the fact that it does provide nitrogen, are factors that, while significant in their own rights, do not directly address the economic implications tied to its price relative to other sources.