MAP is an efficient source of phosphorus.
It facilitates plant uptake of the phosphorus naturally present in the soil. This is due to the ammonium (NH4+) in MAP, which lowers the pH in the root zone and thus enhances phosphorus availability.

Diammonium hydrogen phosphate is widely used in agriculture. It is used as a nitrogen and phosphorus fertilizer to supply nitrogen and phosphorus nutrients required by crops, promote plant growth, improve yield and quality. In addition, diammonium hydrogen phosphate can also be used to control phosphorus deficiency in soil, and can improve soil texture and fertility.