One of the major cropping fertilisers used in Australia as a source of phosphorus and nitrogen, MAP and MAP blends are used extensively in cropping systems and for sowing pastures.

The process for manufacturing MAP is relatively simple. In a common method, a one-to-one ratio of ammonia (NH₃) and phosphoric acid (H₃PO₄) is reacted and the resulting slurry of MAP is solidified in a granulator.

The key difference between MAP and DAP fertilizer is that MAP fertilizer contains about 10% nitrogen, whereas DAP fertilizer contains about 18% nitrogen. MAP and DAP fertilizer are types of ammonium fertilizers. These fertilizers are widely used for agricultural purposes as sources of nitrogen and phosphorus.

MAP is manufactured by combining one mole (molecular weight) of ammonia with one mole of phosphoric acid. DAP is produced by adding 2 moles of ammonia with one mole of phosphoric acid. The additional ammonia in DAP adds beneficial nitrogen, but can create unfavorable chemical reactions in soil solution.

– nitrogen content: usually 10 to 11% for MAP and 18% for DAP. However because DAP contains about twice as much ammonium-nitrogen as MAP, and because its pH of dissolution is more alkaline than MAP, DAP has greater potential for nitrogen loss through ammonia volatilization when broadcast onto neutral to alkaline soils.

Ammoniacal nitrogen is about three times stronger an acid than nitrate nitrogen is a base. For example, a fertilizer such as 17-4-17 has about 25 percent ammoniacal nitrogen and 75 percent nitrate nitrogen (1 NH4-N:3. NO3-N ratio), and the reaction produced by the 17-4-17 fertilizer tends to be neutral.

DAP fertilizer is an excellent source of P and nitrogen (N) for plant nutrition. It’s highly soluble and thus dissolves quickly in soil to release plant-available phosphate and ammonium. To prevent such damage, users should avoid placing high concentrations of DAP near germinating seeds.

The average pH in solution is 7.5–8. The typical formulation is 18-46-0 (18% N, 46% P2O5, 0% K2O). DAP can be used as a fire retardant.

The key difference between DAP and NPK fertilizer is that the DAP fertilizer has no potassium whereas the NPK fertilizer contains potassium as well. The term DAP refers to diammonium phosphate, and it is a phosphate fertilizer; the world’s most common phosphorus fertilizer.

As ammonium is released from dissolving DAP granules, volatile ammonia can be harmful to seedlings and plant roots in immediate proximity. This potential damage is more common when the soil pH is greater than 7, a condition that commonly exists around the dissolving DAP granule.

The composition of DAP is 18% Nitrogen and P2O5 46%. Within the same facility, Hindalco can also produce nitrogen phosphorus potassium (NPK) complexes as value-added downstream products.

Di-ammonium Phosphate popularly known as DAP is a preferred fertilizer in India because it contains both Nitrogen and Phosphorus which are primary macro-nutrients and part of 18 essential plant nutrients. DAP (NH4)2HPO4: Fertilizer grade DAP Contains 18% Nitrogen and 46% Phosphorus (P2O5)..

Top 10 Agro Fertilizers Companies in India

• Coromandel International Ltd.
• National Fertilizers Ltd.
• Chambal Fertilisers & Chemicals Ltd (KK Birla)
• Rashtriya Chemicals & Fertilizers Ltd.
• Zuari Agro Chemicals Ltd (Adventz)
• Gujarat Narmada Valley Fertilizers & Chemicals Ltd.
• Deepak Fertilisers & Petrochemicals Corporation Ltd.

The CDC says the dangers of … They also generally include potassium and phosphorus. DAP; It is nitrogen and phosphorus fertilizer mostly in form of granules. The most significant harmful effects come from fertilizer that is designed to kill or prevent weeds.

Plant fertilizers can poison people and pets if they are inhaled or accidentally ingested. Touching the fertilizer may cause skin irritation, and ingesting it may be poisonous. Nitrates are the ingredients that cause the poisoning. Nitrates are a form of nitrogen that plants can easily absorb.

One of the problems with chemical fertilizers is they seep through the soil into the groundwater and other water sources, leading to contamination. Now, NPK in small quantities is non-toxic, but a lot can kill the balance of nature in various ways.