Inorganic fertilizers

Inorganic fertilizers

Fertilizer is a technical fertilizer used in agriculture and gardening in order to give the soil one or more nutrients that can be used by plants.

In the following list the main organic fertilizers present on the market, with the solubility in water and the title in elements.

Fertilizer Solubility in water (%) N P2O5 K2O Ca Mg S
Ammonia, anhydrous 100 82
Ammonia, in solution 100 16-25
Ammonium nitrate 100 33.5
Ammonium nitrate and limestone 100 20.5 7.3 4.4
Ammonium sulphate 100 21 23.7
Ammonium sulphonitrate 100 26 15.1
Calcium cyanamide (CaNCN) 100 21 38.5
Calcium nitrate 100 15 19.4 1.5
Nitrogen in solution 100 21-49
Sodium Nitrate 100 16
Urea coated with sulfur variable 35 21
Urea 100 46
Ureaform variable 38
Ammonium superphosphate 35 3 – 6 18 – 20 17.2 12
Ammonium sulphate phosphate 90+ 13 – 16 20 – 39 15.4
Ammonium phosphonitrate 100 27 15
Ammonium polyphosphate 100 10 – 15 34 – 62
Bone meal 2 – 4.5 22 – 28 20 – 25
Diammonium phosphate 95+ 16 – 21 48 – 53
Ammonium phosphate 90+ 11 48 1.1 2.2
Nitric phosphate 40 14 – 22 10 – 22 8 – 10 1 – 3.6
Phosphoric acid 100 52 – 60
Rock phosphate <1 30 – 36
Superphosphate 85 18 – 20 20.4 11.9
Concentrated superphosphate 87 42 – 50 13.6 1.4
Superphosphoric acid 100 69 – 75
Potassium and magnesium sulphate 100 22 11.2 22.7
Potassium chloride 100 50 – 52
Potassium nitrate 100 18 46
Potassium sulfate 100 50 1.2 17.6
Ternaries 100 20 10 10
Ternaries 100 12 12 12
Ternaries 100 11 22 16
Ternaries 100 10 10 10




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