Fertilizer Effect and Benefits
Ammonium sulphate is one of the most widely used fertilizers in agriculture, applied to meet plant nitrogen and sulphur requirements. It belongs to the group of physiologically acidic fertilizers and is particularly suitable for alkaline and neutral soils. Due to its high sulphur content, it is especially beneficial for sulphur-deficient soils.
The use of ammonium sulphate gradually acidifies the soil; however, alkaline soils are acidified only slightly. The nitrogen contained in this fertilizer is in ammonium form (NH₄), which is absorbed by plants more slowly and provides a long-lasting nitrogen supply. Sulphur is essential for all plants, as it plays a key role in amino acid synthesis. Since plants require a large amount of sulphur in spring, ammonium sulphate is recommended to be combined with fertilizers containing nitrate nitrogen (NO₃), which plants absorb rapidly.
Composition
- Nitrogen (N) – 21%
- Ammonium nitrogen (N-NH₄) – 21%
- Sulphur (S) – 24%
Application Rates
| Crop | Application Time | Rate, kg/ha |
|---|---|---|
| Spring Rapeseed | Before sowing or at the beginning of vegetation | 300–500 |
| Winter Rapeseed | In spring, when vegetation resumes | 300–500 |
| Cereals | In spring, at the beginning of vegetation | 200–400 |
| Maize | Before sowing or during vegetation | 200–400 |
| Sugar Beet | Before sowing or during vegetation | 200–300 |