Impact Fertilisers


Mono-Ammonium Phosphate

(MAP)  10-22-0-1

 

1. FEATURES

  •          High analysis source of phosphorus

  •          Cost effective granular product

  •          Low in heavy metals

  •          Good handling characteristics

  •          Nitrogen in MAP is in the ammonium form, which resists leaching and is a slower release form of nitrogen

  •          Has an acid reaction in the soil which can be an advantage in neutral and high pH soils. Thus MAP is used in preference to DAP on alkaline soils

 

2. TYPICAL ANALYSIS

Total Nitrogen (N)

10.0%

Total Nitrogen as ammonium

10.0%

Total Phosphorus (P)

22.0%

Available Phosphorus (P)

21.9%

Phosphorus (P) as Water Soluble

20.1%

Phosphorus (P) as Citrate Soluble

1.7%

Phosphorus (P) as Citrate Insoluble

0.17%

Total Sulphur (S)

1.5%

 

3. PHYSICAL PROPERTIES

Sizing

2 - 4mm 90%

Bulk Density

0.92-0.95 tonnes/m3

Appearance

Brown to black granules

Angle of repose

31 - 33°

 

4. MANUFACTURE

Ammonia gas is combined with phosphoric acid, granulated, dried and screened.

 

5. USES

One of the major cropping fertilisers used in Australia as a source of both phosphorus and nitrogen, MAP and MAP blends are used extensively in cropping systems and for sowing pastures. The low level of N makes it useful as a 'starter' fertiliser and as there is no free ammonia, the risk of affecting germinating seeds is minimal.

 

6. STORAGE & HANDLING

  •          Will store freely in flat storage for extended periods with little concern about moisture uptake.

  •          Covering with a tarp will reduce any moist air uptake.

  •          The use of augers may damage the fertiliser and increase any handling problems.

  •          Do not leave exposed to moist air.

  •          Either fill or empty (completely), the drill or airseeder fertiliser box overnight.

  •          Cover seeding equipment with a tarp. Tarp undercarriage of seeder or park it out of the paddock on a road or dry ground.

  •          Raise the tynes from the soil to stop moisture moving up the tubes.

 

7. RESTRICTIONS

For sowing there is little risk of affecting germination, even at high rates. As a general rule, a maximum of 20kg/ha of nitrogen at seeding of cereals should be used.

When applying MAP, the fertiliser should be banded 5cm away from the seed, either below or to the side. MAP is low in sulphur (1%). It is not recommended for high sulphur requiring crops such as canola, unless blended with sulphate of ammonia or other sulphur source.

Do not store in silos.

 
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