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Monoammonium Phosphate

Packaging: 25 kg, 50kg bags or 1000 kg. big bags

Packaging material: New pp or pe bags

Delivery locations: Worldwide

Delivery terms: FOB, CIF, CFR

Delivery time: Up on destination

Payment terms: bank transfer, transferable letter of credit – Negotiable

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Product Description

Monoammonium phosphate is abbreviated as MAP and it is a great source of N and P which is very widely used. The two constituents that are used in its making are quite common within the industry and this fertilizer has the very greatest P content in comparison to all the solid fertilizers that are common.

Production process

The production of MAP is quite simple one of the most common methods used is a one to one ratio of NH3 (ammonia) and H3PO4 (phosphoric acid) is reacted and after this, the slurry MAP is put in granulator so as to be solidified. This is a very simple method with which the MAP can be manufactured.

Another method that is usually used is to introduce both materials in pipe-cross reactor. The reaction generates heat so as to evaporate the water and then lead to the solidification of map. These two variations are usually used in the creation of MAP. An advantage of MAP production is that H3PO4 which si the lower quality can actually be used when compared to the other P fertilizers that usually need some more acid that is pure grade.

P205 equivalent MAP content usually varies from 48-61% but this depends on the impurity that is present within the acid. A common composition of the fertilizer stands at 11-52-0.

Agricultural use

Monoammonium phosphate fertilizer is and has always been a very important fertilizer that is in granular form for a long time now. This fertilizer is soluble in water and the dissolution process is quite rapid once in the soil when the amount of moisture present is adequate.

When dissolution occurs, there are some very basic components of fertilizer that separate so as to release H2PO4 and NH4+.

The nutrients mentioned above are very important for the sustenance of plant growth that is very healthy. The solution that surrounds the granule has a pH which is moderately acidic. This makes the fertilizer a great choice especially when the soils are neutral or when the pH within the soil is quite high.

Different agronomic studies have been conducted and it has been shown that there is really a great difference in the P nutrition from different commercial fertilizers under many conditions. The MAP in its granular form is usually applied in the concentrated bands just beneath the surface of the soil which is in proximity of the roots growing or the surface bands.

Monoammonium phosphate fertilizer is most commonly applied through spreading across a field and then mixing into the soil surface with the tillage. When it is in form of powder, it is a very important component of the suspension fertilizers. When made using H3PO4 in its pure form, it dissolves readily into a solution that is totally clear and this can be applied as foliar spray or it can be added into the water used for irrigation. P205 content of the MAP that is of a high quality stands at 61%.

Different management practices

The use of MAP doesn’t associate with any kind of special precautions. The fact that the acidity is slight reduces the amount of NH3 being lost into the air. It can also be placed near the germinating seeds without any kind of concern for damage occurring.

When used as foliar spray or when added to the water used for irrigation, it needs to be mixed with magnesium or calcium fertilizers.

The handling and storage properties of MAP are good. There are some different chemical impurities within the fertilizer and they include aluminum and iron. These serve as a great condition that prevents any kind of caking. The MAP that is highly pure has conditional added on to it or it may need some form of special handling so as to prevent caking and clumping.

Just like the P fertilizers, it is important to have the appropriate management practices that need to be iused so as to make sure that nutrient loss is at a minimum to the drainage and surface water.

This fertilizer is popular with farmers all around the globe due to the fact that is totally soluble in water. It can also be used on different forms and serves as an important ingredient in the various bulk blended fertilizers.

The pH levels of the fertilizer are low and it can be quite suitable for different alkaline soils. The fact that its ammonia nitrogen is much more than that of DAP makes it a suitable starter fertilizer. This ensures that the potential of damaging seeds is reduced incredibly.


Every granule of Monoammonium phosphate has got nitrogen and phosphorus. The granule sizing is usually at nominal 2-4mm.

The bulk density of MAP is 1.0 tonnes/cubic meter. It can be blended with many other products making it a very versatile fertilizer to use.

MAP is a great source of phosphorus. It is a granular product that is very cost effective. It also comes with a very low count of heavy metal.


The nitrogen contained in this fertilizer is in the form of ammonium and it resists leaching. It also releases the nitrogen in a slow manner.

This is a product that has an acidic effect on the soil and this can be a great advantage to the neutral soils and the ones that have got a high pH. MAP is a preference above DAP in the alkaline soils. The main advantages of monoammonium phosphate fertilizer include:

  • Totally water soluble
  • Consist plant nutrients at a level of 100%
  • It is a very concentrated phosphorus source for different plants
  • There are other free sodium and chloride as well as detrimental elements that are made available for the plants.
  • The fact that pH is low, it makes it less corrosive and much safer as compared to the urea phosphate.
  • It is most suitable in fertigation and for foliar application as well as the production of various blends and nutrient solutions.
  • It offers a double benefit in the sense that it is a great phosphorus source and it also facilitates the uptake of phosphorus that is naturally present within should.

Best application

This fertilizer is used in cropping and is used as a form of nitrogen and phosphorus. MAP and its blends are used very extensively in the cropping systems and also for pasture sowing. The fact tghat the nitrogen level is low makes it very ideal for planting since the effect on the germinating seeds is kept at minimal.

Handling and storage

Monoammonium phosphate fertilizer can be stored quite freely within a shed for a long time and one needs not be too concerned about any kind of moisture uptake. When you cover using a tarp, the moist air uptake is also reduced to a very large extent.

When augers are used, they may cause damage on the fertilizer and this may make it even harder to handle. For it to be safe, do not leave the fertilizer exposed to the moist air.

Also, it may be wise to either fill or keep completely empty the air seeder or drill fertilizer box when you need to leave it overnight.

The equipment should be raised from the soil so as to make sure that moisture doesn’t move up tubes.

The restrictions

When sowing is concerned, the risk of effect on germination is quite low even when the rates are high. As a rule, maximum of 20kg for every hectare of nitrogen at the cereal seeding is highly recommended.

When you are applying monoammonium phosphate fertilizer, you should make sure it is banded some 5cm from seeds wither at the side or below. The fertilizer is very low in sulphur which stands at 1%. Unusually, this fertilizer isn’t appropriate for the crops that require high sulphur like canola unless it is blended with sulphur sources like sulphate of ammonia.

This fertilizer shouldn’t be stored in a silo.

Farming application

The nutrients within the fertilizer are P205 which stands at 52% as well as the ammonical nitrogen at 11%. In many cases, MAP is used so as to add the phosphate and the nitrogen in te correct proportion as needed for farming thins such as barley, wheat and clover especially where the soil sandy.

The fertilizer has crystals that are light gray and they are soluble when water is present. The bulk density is at 0.92 g/cc.

This fertilizer is relatively safe and shouldn’t pose any kind of serious hazard when being used.

The fertilizer is usually stored in different bags and in bulk too.

Solubility and conductivity

Monoammonium phosphate is highly soluble in water and this solubility is usually more enhanced with the increase in the temperature of the water.

The pH is moderately low and it remains quite constant in various concentrations. The electrical conductivity also increases quite substantially when there are some high concentrations of the multi MAP in use.

The most important thing about any fertilizer is quality and it’s important to select the ingredients used in the creation of fertilizers so as to come up with the very best blends that can unlock the full potential of the soil.


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