Nitrogen Source: Why We Don't Use Ammonium Nitrate

Front Row Ag formulator Matt Curran explains why Front Row Ag uses purified, prilled calcium nitrate as the primary nitrogen source in Part A fertilizer. In this video, he discusses how nitrogen form influences crop consistency, metabolic performance, and nutrient management. Topics include:

• Why ammonium nitrogen is less predictable for high-value crop production
• When ammonium may be appropriate for large-scale, non-flowering crops
• The advantages of purified, prilled calcium nitrate
• How nitrate nitrogen supports protein formation and plant metabolism
• Why nitrogen source affects crop steering and uniformity
• The relationship between stable nutrition and consistent flower development
• Why Front Row Ag formulates Part A with purified calcium nitrate

Transcript:

Historically, ammonium-based nitrogen has been well suited for lower-value crops and very large-scale agricultural production—operations covering thousands or even tens of thousands of acres where the goal is rapid, aggressive vegetative growth.

Ammonium promotes fast tissue expansion and abundant foliage, making it an economical choice for crops where maximizing biomass is more important than producing premium-quality fruit or flowers.

Purified calcium nitrate, especially highly purified, prilled products with the ammonium removed, is a much higher-grade fertilizer.

As crop value increases, so does the need for a higher-quality nitrogen source.

High-value crops require large amounts of protein synthesis and metabolic activity to produce premium fruit or flowers. The same principle applies to ornamental crops like chrysanthemums, where producing large, robust flower heads depends on strong protein production and efficient metabolism.

In those situations, it's beneficial to formulate around nitrate nitrogen rather than ammonium.

Ammonium is absorbed very quickly by the plant. It moves into plant tissue rapidly and has a relatively high salt index, meaning salts can accumulate more quickly within the root zone.

That rapid uptake can be advantageous in certain cropping systems, particularly when speed and cost are the primary priorities.

However, when the objective is producing a high-performance, high-quality crop, those same characteristics can become disadvantages.

Water movement through the plant needs to occur at the proper rate—not too fast and not too slow.

Certain nutrient forms give the plant less control over that process, and ammonium is one of those ions.

Because the plant has less control over ammonium uptake, it introduces another variable into the production system.

Nitrate behaves differently.

Its uptake is part of a more tightly regulated ion exchange process, giving the plant greater control over how nitrogen enters the tissue.

That additional level of regulation helps support a more controlled and predictable nutrient uptake process, making nitrate-based nutrition better suited for premium crop production where consistency and quality are the primary goals.