Utilization of Complexing Abilities of Polyphosphates in Liquid Fertilizers, Based on the Example of Fertilizer Type NP and Type NPK with Zinc

Low-condensed ammonium polyphosphates are utilized in recipes for liquid fertilizers, not only as the source of phosphorus but also as a micronutrient complexing agent. The work highlights the results of our own research on the sequestration of ammonium polyphosphates in straight and complex liquid fertilizers, with, for example, zinc. Using the method of X-ray diffraction analysis, crystalline compounds that precipitated from solutions were identified.