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Fertilizer Conversion Factors


A B A to B
Multiply by:
B to A
Multiply by:
Nitrogen
N Ammonia (NH3)
1.2159
0.8224
N Ammonium calcium nitrate [5Ca(NO3)2ïNH4NO3ï10H2O
5.3107
0.1883
N Ammonium nitrate (NH4NO3)
2.8572
0.3500
N Ammonium sulfate [(NH4)2SO4
4.7168
0.2120
N Calcium nitrate [Ca(NO3)2]
5.8572
0.1707
N Diammonium phosphate [(NH4)2HPO4]
4.7138
0.2121
N Monoammounium phosphate (NH4H2PO4)
8.2118
0.1218
N Nitrate (NO3)
4.4266
0.2259
N Potassium nitrate (KNO3)
7.2176
0.1386
N Protein (crude)
6.2500
0.1600
N Sodium nitrate (NaNO3)
6.0679
0.1648
N Urea
2.1437
0.4665
Phosphorus
 
A to B
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B to A
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P Phosphate (PO4)
3.0662
0.3261
P Phosphoric Acid (P205)
2.2914
0.4364
P205 Diammonium phosphate [NH4)2HPO4]
1.8607
0.5374
P205 Dicalcium phosphate (CaHPO4•2H20)
2.4247
0.4124
P205 Monoammonium phosphate [Ca(H2PO4)2]
1.6207
0.6170
P205
Tricalcium phosphate [Ca3(PO4)2]
2.1829
0.4581
Potassium
 
A to B
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B to A
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K Potash (K2O)
1.2046
0.8301
K2O Muriate of potash (KCl)
1.5828
0.6317
K2O Potassium of carbonate (K2CO3)
1.4672
0.6816
K2O Pottassium of nitrate (KNO3)
2.1466
0.4658
K2O
Sulfate of potash (K2SO4)
1.8499
0.5405
Boron  
A to B
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B to A
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B Borax (Na2B4O7•10H20)
8.8129
0.1134
B Boron trioxide (B2O3)
3.2181
0.3107
B Sodium tetraborate anhydrous (Na2B4O7•5H20)
4.6502
0.2150
B
Sodium tetraborate pentahydrate (Na2B4O7)
6.7315
0.1485
Calcium
 
A to B
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B to A
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Ca
Calcium carbonate(CaCO3)
2.4973
0.4004
Ca
Gypsum (CaSO4•2H20)
4.3000
0.2326
Ca Calcium hydroxide [Ca(OH)2]
1.8487
0.5409
Ca
Calcium oxide (CaO)
1.3992
0.7147
Cobalt
 
A to B
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B to A
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Co
Cobalt nitrate [Co(NO3)2•6H20]
4.9383
0.2025
Co
Cobalt sulfate (CoSO4•7H20)
4.7690
0.2097
Co
Cobalt sulfate (CoSO4)
2.6299
0.3802
Copper
 
A to B
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B to A
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Cu Copper sulfate (CuSO4)
2.5119
0.3981
Cu
Copper sulfate (CuSO4)ï5H20
3.9293
0.2545
Iron
 
A to B
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B to A
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Fe Ferric sulfate [Fe2(SO4)3]
3.5804
0.2793
Fe Ferrous sulfate (FeSO4)
2.7203
0.3676
Fe
Ferrous sulfate (FeSO4ï7H20)
4.9776
0.2009
Magnesium
 
A to B
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B to A
Multiply by:
Mg Epsom salts (MgSO4ï7H20)
10.1356
0.0987
Mg Magnesium oxide (MgO)
1.6579
0.6032
Mg
Magnesium sulfate(MgSO4)
4.9501
0.2020
Manganese
 
A to B
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B to A
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Mn Manganese sulfate (MnSO4)
2.7486
0.3638
Mn Manganese sulfate(MnSO4•4H20)
4.0602
0.2463
Molybdenum  
A to B
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B to A
Multiply by:
Mo Sodium molybdate (Na2MoO4ï2H20)
2.5218
0.3965
Sodium
 
A to B
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B to A
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Na Sodium chloride (NaNO3)
3.6970
0.2705
Na
Sodium nitrate (NaCl)
2.5417
0.3934
Sulfur
 
A to B
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B to A
Multiply by:
S Ammonium sulfate [(NH4)2SO4]
4.1211
0.2426
S Gypsum (CaSO4•2H20)
5.3750
0.1860
S Magnesium sulfate (MgSO4)
3.1350
0.3190
S Potassium sulfate (K2SO4)
5.4438
0.1837
S Sulfate (SO4)
3.0000
0.3333
S
Sulfuric acid (H2SO4)
3.0587
0.3269
Zinc
 
A to B
Multiply by:
B to A
Multiply by:
Zn Zinc oxide (ZnO)
1.2447
0.8034
Zn Zinc sulfate (ZnSO4)
2.4693
0.4050
Zn
Zinc sulfate (ZnSO4•H20)
2.7449
0.3643
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