Thursday 24 March 2016

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



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