MAP

Monoammonium phosphate (MAP) is a widely used source of P and N. It is made of two constituents common in the fertilizer industry and has the highest P content of any common solid fertilizer.

MAP has been an important granular fertilizer for many years. It is water soluble and dissolves rapidly in soil if adequate moisture is present. Upon dissolution, the two basic components of the fertilizer separate again to release NH₄⁺ and H₂PO₄^-.
Both of these nutrients are important to sustain healthy plant growth. The pH of the solution surrounding the granule is moderately acidic, making MAP an especially desirable fertilizer in neutral and high pH soils.

There are no special precautions associated with the use of MAP. The slight acidity associated with this fertilizer reduces the potential for NH3 loss to the air. MAP can be placed in close proximity to germinating seeds without concern for NH3 damage.
When MAP is used as a foliar spray or added to irrigation water.
A high purity source of MAP is used as a feed ingredient for animals.