| |
Immediate or Short-term effect |
Long-term effect |
| 1. Ammonium nitrate |
None |
Moderately acidic |
| 2. Ammonium sulfate |
None |
Strongly acidic |
| 3. Monoammonium phosphate |
None due to N |
Strongly acidic |
| 4. Diammonium phosphate |
Basic because 1 molecule of NH4+ is released |
Moderately acidic |
| 5. Ammoniated superphosphate |
None due to N but acidic around
phosphate granules |
Moderately acidic |
| 6. Nitrogen solutions with no free ammonia (ammonium nitrate – urea) |
None |
Moderately acidic |
7. Nitrogen solutions with
free ammonia (ammonia in ammonium nitrate) |
Basic |
Moderately acidic |
| 8. Anhydrous ammonia |
Strongly basic |
Moderately acidic |
| 9. Aqua ammonia |
Strongly basic |
Moderately acidic |
| 10. Urea |
Very slightly basic |
Moderately acidic |
| 11. Sodium nitrate |
Very little |
Basic |
| 12. Calcium nitrate |
Very little |
Basic |
| 13. Potassium nitrate |
Very little |
Basic |
