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