Composition of some important fertilizers

Composition of some important fertilizers

Common names	N	P2O5	K2O	S	MgO
Nutrients as % of product
Nitrogen fertilizers
Ammonia	82	0	0	0	0
Ammonium sulphate	21	0	0	23	0
Ammonium nitrate	33-34.5	0	0	0	0
Calcium ammonium nitrate	20.4-27	0	0	0	0
Urea	45-46	0	0	0	0
Phosphate fertilizers
Single superphosphate	0	16-20	0	12	0
Triple superphosphate	0	46	0	0	0
Diammonium phosphate	18	46	0	0	0
Monoammonium phosphate	11	52	0	0	0
Ground rock phosphate	0	20-40	0	0	0
Potash fertilizers
Muriate of potash    (potassium chloride)	0	0	60	0	0
Sulphate of potash	0	0	50	18	0
Sulphate of potash magnesia	0	0	22-30	17-22	10-11
Magnesium fertilizers
Kieserite	0	0	0	20-22	25-27
Epsom salt	0	0	0	12-13	15-16
Complex fertilizers
NPK fertilizers	5-25	5-25	5-25	*	*
NP fertilizers	15-25	15-25	0	*	0
NK fertilizers	13-25	0	15-46	*	0
PK fertilizers	0	7-30	10-30	*	*
* some with S and/or Mg and/or micronutrients Note: the above numbers represent the average range of nutrient content in commercially available fertilizers