Immediate precipitation of the zinc as zinc ammonium orthophosphate will occur. Any desired amount of Nulex Liquid Zinc may be added to orthophosphate suspensions made from MAP or phosphoric acid.
Many factors influence the stability of zinc in liquid fertilizers.
Nulex Liquid Zinc may be added to NP fertilizers with a high polyphosphate content. The pH, other metal ions and storage temperature all affect the stability of a fertilizer mixture. High storage temperatures accelerate the hydrolysis rate of polyphosphates. The presence of other ions such as magnesium, iron, aluminum and fluoride tend to destabilize the mixture, particularly at higher pH levels. Generally, the optimum pH for the longest storage life of fertilizer mixtures is from about 5.8 to 6.4.