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CONVERSION FACTORS
Nutrients as a % of product:
Products |
N | P2O5 | K2O |
S | MgO |
| Nitrogen fertilizers |
|||||
| Calcium ammonium nitrate | 82,2 |
- | - | - | - |
| Ammonia |
46 |
- | - | - | - |
| Urea | 33,5* 32-34,5 |
- | - | - | - |
| Ammonium nitrate | 27* ------- 26-30 |
- | - | - | - |
| Urea ammonium nitrate | 30* ------- 28-32 |
- | - | - | - |
| Ammonium chloride | 25 | - | - | - | - |
| Ammonium sulphate | 21 | - | - | 24 |
- |
| Phosphate fertilizers | - | ||||
| Phosphate rock | - | 30,9 |
- | - | - |
| Phosphoric acid | - | 100 | - | - | - |
| MAP | 11 |
52 | - | - | - |
| DAP | 18 | 46 | - | - | - |
| TSP | - | 46 | - | - | - |
| SSP | - | 15 | - | 12 | - |
| Potash fertilizers | - | - | - | - | - |
| Potassium chloride | - | - | 60
|
- | |
| Potassium sulphate | - | - | 50 | 18 |
- |
| Potassium magnesium sulphate | - | - | 22- 30 | 17-22 | 10-11 |
| Complex fertilizers | |||||
| NPK fertilizers | 5-25 | 5-25 | 2-25 | *** |
*** |
| NP fertilizers | 15-25 | 15-25 | - | *** | - |
| NK fertilizers | 13-25 | - | 15-46 |
*** | - |
| PK fertilizers | - | 7-30 | 10-30 | *** | *** |
| Sulphur | - | - | - | 100
|
- |
| Magnesium fertilizers | |||||
| Kieserite | - | - | - | 20-22 | 25-27 |
| Epsom salts | - | - | - | 12-13 | 15-16 |
* Average grade - *** some with S and/or Mg and/or micronutrients
Area of Distance
1 hectare (ha) = 2.471 yards
1 meter = 1.0936 yards
1 acre = 4480 sq. yards
1 acre = 0.4047 hectare
1 yard = 0.9144 metre
Weight
1 kilogram (kg) = 2.2046 pounds
1 kg/ha = 0.9822 lb/acre
1 metric tonne = 1.1023 short tons (2000 lb)
1 metric tonne = 0.9842 long ton (2240 lb)
1 pound (lb) = 0.4536 kilogram
1 lb/acre = 1.1208 kg/ha
Fertilizer Phosphorous
To change P2O5 (phosphate) to P
multiply P2O5 by 0.4364
To change P to P2O5
multiply P by 2.2914
Potassium
To change K2O (potash) to K
multiply K2O by 0.8302
To change K to K2O
multiply K by 1.2046
Source: International Fertilizer Industry Association (IFA).
