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Asit Roy | asitroy

Phosphate Fertilizers: Concentrations and Types

Apr 24th 2015 at 2:43 AM

Phosphates are salts of phosphoric acid, and comprise of hydrogen, oxygen and phosphorous. Phosphates benefit plants because phosphate helps the growth of DNA and RNA in them, therefore helping them yield healthy flowers and fruits. For instance, the use of phosphates to mature flowering plants will help increase their flower production.


Phosphate fertilizers are manufactured from rock phosphate, which is mined and processed in different parts of the world, including Russia, North Africa and United States.


Production of Phosphate Fertilizers


Phosphate fertilizers being manufactured from phosphoric acid, the latter needs to be created first. Phosphoric acid can be produced through either the wet process or the dry process. While in the wet process, the rock phosphate is treated with chemicals to yield phosphoric acid, the dry process entails heating the rock phosphate within electrical furnaces. Whatever process be chosen, the phosphoric acid yielded is heated to release water, therefore producing superphosphoric acid, which contains 75% of phosphate, in concentration.


Phosphate fertilizers can contain phosphates in the form of orthophosphate, which is the simplest form of phosphate supply, and is readily absorbed by the plant. Phosphates can also be in the form of polyphosphates, which mix with the soil, to release orthophosphates for the plants to absorb.


Concentration and types of Phosphate Fertilizers


  • Rock Phosphate - Raw form of phosphate, that’s mined, and has limited concentrations of phosphate.

  • Superphosphate - It’s a older form of phosphate, that’s yielded by treating rock phosphate with sulfuric acid. It contains high concentration of phosphate.

  • Triple Superphosphate - It’s a granular, solid fertilizer, with good handling properties. The concentration of phosphate is significantly high in this type of phosphate fertilizer.

  • Mono-ammonium Phosphate - A granular form of phosphate fertilizer, mono-ammonium phosphate doesn't absorb moisture, when stored. It’s also considerably resistant to breakdown, when being handled.

  • Di-ammonium Phosphate - Granular, solid phosphate fertilizer that has a high concentration of nitrogen and lower concentration of phosphate.

  • Ammonium Polyphosphate - When kept at temperatures below -18 degrees, the solution will settle down, and will require being brought back to the liquid form.


While phosphate fertilizers can be beneficial to plants and help their produce fruits and flowers better, excessive use of it can result in ecological consequences. Although phosphate fertilizers bind very well with soil, if they manage to dissolve in water bodies, they’ll lead to the growth of algae and water weeds.


Looking for a reliable phosphate supplier or soda ash supplier in India? Visit us at to view our phosphate offerings.


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