Comparison · fertilizer
Sulfur sources: elemental sulfur vs ammonium sulfate vs gypsum vs kieserite
Compare materials that supply sulfur, with their other nutrient/pH effects.
| Dimension | Elemental sulfur | Ammonium sulfate | Gypsum | Kieserite |
|---|---|---|---|---|
| Category | Fertilizer | Fertilizer | Fertilizer | Fertilizer |
| Class | secondary-micronutrient | mineral-nitrogen | secondary-micronutrient | secondary-micronutrient |
| Typical grade (N-P₂O₅-K₂O) | ~90% S | 21-0-0-24S | ~23% Ca, ~18% S | ~16% Mg, ~22% S |
Methodology
Class/grade read from each entry.
Limitations
- Educational only; gypsum supplies Ca+S without raising pH, unlike lime.
Sources
This article draws on the following authoritative sources. See our sources & methodology for how they are selected.
- [1]IFA — International Fertilizer Association (opens in a new tab)Moderate
International Fertilizer Association (IFA)
- Type:
- Standards body
- Jurisdiction:
- Global
- Accessed:
- 2026-07-12